What TutorTwin is
Every student knows the moment. It is late, the homework is due tomorrow, and one question will not give way. The textbook explains the idea in a way that does not quite land, the class notes skip the step you need, and there is nobody to ask. A private tutor is not available at eleven at night, and searching the internet turns up either a bare answer with no working or a forty-minute video about something slightly different.
TutorTwin exists for that moment. It is an AI study assistant that you reach the same way you reach your friends: on WhatsApp. You send it the question in whatever form is easiest - a photo of the page, a screenshot, a PDF of the worksheet, a voice note, or just a typed message - and it replies with an explanation that walks through the problem one step at a time. If a step does not make sense, you reply and ask about that step. The conversation carries on naturally, because TutorTwin remembers what you were working on, so a follow-up such as "why did you divide by two there?" just works.
We think of it as a study buddy rather than a search engine. A search engine gives you results; a study buddy sits with you on the problem. TutorTwin reads what you send, works through it with you, checks answers you are unsure about, and gives you more practice when you want it. It is available every day, at any hour, for as many questions as you like within your plan.
TutorTwin is made by NXTutors Edtech Pvt Ltd, an education company that serves students worldwide and whose wider work includes connecting students with human tutors through nxtutors.com. TutorTwin grew out of a simple observation from that work: most of a student's questions arrive between tutoring sessions, not during them. A tutor you can message at any time fills that gap.
A homework doubt solver that teaches
In classrooms from South Asia to the Middle East, a question you are stuck on is called a "doubt"; elsewhere it might be a sticking point or just "the one I can't get". Whatever you call it, clearing it quickly is one of the most important parts of studying. A doubt left unsolved grows: it turns into a gap in the chapter, then a lost mark in the test, then a topic a student quietly avoids. TutorTwin is built to be the fastest way to clear a homework doubt - and to make sure it stays cleared.
Instant doubt solving, any time
Most doubt solving happens late in the evening, when school is over and teachers are not available. With TutorTwin, you photograph the doubt and send it on WhatsApp. Within seconds you get a full, step-by-step solution. There is no queue, no waiting for a teacher to come online, and no limit on how many doubts you send in a day for everyday study.
More than an answer finder
Many doubt solver apps match your photo to an answer from a database. That helps only if your exact question is already there, and it rarely teaches you why. TutorTwin actually works through the question you send - even one your teacher wrote herself - and explains the reasoning behind every step. Then it keeps the conversation open: if one step is still unclear, you ask about that step, and it explains it a different way. The doubt is solved when you understand it, not when an answer appears.
Doubts in every form
A homework doubt might be a maths problem in a textbook, a physics numerical on a worksheet, a chemistry reaction you cannot balance, a diagram in biology, or a line of a poem in English. It might be printed, handwritten, in a PDF or easier to explain out loud. TutorTwin accepts all of them - photo, PDF, voice note or text - so no doubt has to wait until you can type it out perfectly.
From one doubt to a strong topic
When a doubt is cleared, ask TutorTwin for two or three similar questions. Solving them yourself - with the explanation fresh in your mind - is what turns a single solved doubt into a topic you are confident about. That is the difference between a homework doubt solver that gives answers and one that builds understanding.
Your personal AI teacher
A classroom teacher looks after thirty or forty students at once. A private tutor sees you for an hour or two a week. A personal AI teacher is there for one student - you - whenever you need it. That is what TutorTwin is designed to be.
One-to-one, at your pace
In a class, the lesson moves at the pace of the group. With a personal AI teacher, it moves at yours. You can go slowly through a topic that confuses you, skip quickly past what you already know, and ask the same thing three different ways until it clicks. TutorTwin never sighs, never hurries you, and never makes you feel that a question is too basic to ask.
Explanations pitched at your level
A good teacher explains differently to a seventh-grader and a student in their final year of school. Tell TutorTwin your grade, board or level and it pitches its explanations to match - simpler language and more examples for younger students, more rigour and exam technique for older ones. If an explanation is too advanced or too basic, just say so and it adjusts.
A teacher that remembers the conversation
Your personal AI teacher keeps track of what you are working on in the chat, so follow-up questions flow naturally, just like talking to a tutor sitting beside you. And because it lives in your own WhatsApp chat, all your past explanations are there to revise from.
With a name you choose
You decide what your personal AI teacher is called - many students choose the name of a teacher they love - so asking for help feels familiar. It is always clear, though, that it is an AI: it never pretends to be a real person.
Why WhatsApp
We built TutorTwin on WhatsApp on purpose, and the choice shapes almost everything about how it feels to use.
It is already on your phone
WhatsApp is one of the most widely used messaging apps in the world, and it is already installed on most students' and parents' phones. That means there is nothing new to download, no storage to free up, and no new account to create. Many education apps lose students at the very first step - the install screen, the sign-up form, the forgotten password. TutorTwin skips all of it. You subscribe once, your tutor messages you, and from then on you simply open the chat.
It works on modest phones and slow connections
Many students do their homework on a shared family phone, an older handset, or a patchy mobile connection. WhatsApp is designed to cope with exactly those conditions. A photo of a question is small to send, a text reply is tiny to receive, and a voice note works even when typing a long question on a small screen is painful. TutorTwin inherits that lightness.
It fits the way students already ask for help
Students already photograph questions and send them to classmates. They already send voice notes when a problem is too long to type. They already keep study groups on WhatsApp. TutorTwin does not ask anyone to learn a new habit - it answers the message you would have sent to a friend, except it answers at 2am, explains every step, and never gets tired of "one more question".
It keeps your learning in one place
Because the whole conversation lives in one WhatsApp chat, your explanations stay there for revision. Before a test you can scroll back through the problems you worked on, re-read the steps, and ask for fresh practice on the topics that gave you trouble. It becomes a running notebook of everything you asked.
How it works
Getting started takes about a minute, and there are only three steps.
- Subscribe. On the sign-up page, enter the student's name, the WhatsApp number the tutor should use, the name you would like your tutor to answer to, and your main subject. Choose your country, pick a tier and a 1 month, 3 month or 1 year plan, and pay securely.
- Get a message. The moment your payment is confirmed, your tutor sends a welcome message to that WhatsApp number. There is nothing to install and nothing to activate by hand.
- Start asking. Reply with your first question - a photo, a PDF, a voice note or text - and get a step-by-step explanation back.
From then on, using TutorTwin is simply chatting. Send a question, read the explanation, ask about any step you do not follow, and move on to the next one. You can ask for a hint instead of a full solution, ask for three more questions like the one you just finished, or send your own attempt and ask where it went wrong.
What a typical session looks like
Suppose a student photographs a page of quadratic equations and writes "solve Q3 please". TutorTwin reads the photo, finds question three, and replies with the working: identifying the equation, choosing a method, carrying out each step, and checking the result by substituting it back. If the student replies "why did you split the middle term like that?", TutorTwin explains that one idea in more detail. If they then say "give me two more like this", it writes two fresh questions of the same type, waits for the student's answers, and checks them. That loop - explain, question, practise, check - is where real learning happens, and TutorTwin is built around it.
Photos, PDFs, voice notes and text
A good tutor meets you where you are. TutorTwin accepts questions in the four forms students actually use.
Photos of questions - printed or handwritten
Take a photo of the page and send it. TutorTwin reads both printed text and handwriting, including equations, diagrams with labels, tables and multiple questions on one page. If there are several questions in the photo, tell it which one you want - "Q4" or "the second one" - and it will focus on that. For best results, photograph one page at a time, in good light, held flat, with the whole question in the frame. If a photo is too blurry to read with confidence, TutorTwin tells you so and asks for a clearer one rather than guessing at the numbers - a wrong guess about a digit leads to a confident wrong answer, and we would rather ask.
PDFs and worksheets
Teachers often share homework as PDF worksheets or scanned chapters. Send the whole PDF and ask for exactly what you need: "question 7 on page 2", "summarise section 3", or "explain the example at the top". TutorTwin reads the pages, finds what you asked for and leaves the rest alone. This is especially useful for long assignments, past papers and revision packs, where retyping a question would take longer than solving it.
Voice notes
Some questions are easier to say than to type - particularly long word problems, or when you want to explain what you have already tried. Record a voice note the way you would explain it to a friend. TutorTwin listens, works out the question, and replies in writing so you have the steps to refer back to. Voice notes are also a great option for younger students and for anyone typing on a small screen.
Plain text
Of course, you can simply type. Short conceptual questions - "what is the difference between speed and velocity?", "why does ice float?", "what does a semicolon do?" - work perfectly as text, and you can combine text with a photo to add context, such as "this is from the trigonometry chapter, I got 45° but the book says 135°".
Subjects and levels
TutorTwin helps across the school curriculum and into early university, with a particular focus on the subjects where step-by-step working matters most.
Mathematics
Arithmetic, fractions and percentages; algebra, equations and inequalities; quadratics, polynomials and functions; geometry, mensuration and coordinate geometry; trigonometry; sequences and series; probability and statistics; matrices and vectors; limits, differentiation and integration. For each problem, TutorTwin shows the method, not just the number, so the approach transfers to the next question and to the exam.
Physics
Motion and kinematics, forces and Newton's laws, work, energy and power, gravitation, waves and sound, light and optics, electricity and circuits, magnetism, and modern physics. TutorTwin is particularly careful with numericals: it lists what is given, chooses the right relationship, keeps track of units, and sanity-checks whether the answer is physically sensible.
Chemistry
Atomic structure and the periodic table, chemical bonding, the mole concept and stoichiometry, balancing equations, acids, bases and salts, redox, chemical kinetics and equilibrium, thermodynamics, and organic chemistry reactions and naming.
Biology
Cells, genetics and heredity, human physiology, plant biology, ecology and evolution. In biology, TutorTwin focuses on clear explanations, well-structured answers and the key terms examiners look for, and it can help you turn a long chapter into revision notes.
And more
Students also use TutorTwin for English grammar, comprehension and essay structure; computer science and programming concepts; accountancy and business studies; economics; and general study skills such as planning revision and breaking a big assignment into steps. For essays and projects, TutorTwin helps you plan, understand and improve your own work - it is a tutor, not a ghost-writer.
Which levels?
TutorTwin is designed for middle school, high school and pre-university students - roughly ages 11 to 18, grades 6 to 12 - and it is equally useful for first-year university students revisiting foundations, and for adults returning to study. It adapts its explanations to the level of the question you send.
Help at every stage of school
What a student needs from a homework doubt solver changes as they grow. TutorTwin adapts its explanations to the level of the question and to the grade you tell it.
Middle school (grades 6 to 8)
This is where the foundations are laid: fractions and decimals, ratios, basic algebra, the first science concepts, grammar and comprehension. TutorTwin uses simple language, everyday examples and short steps, and it is patient with the same question asked twice. Voice notes are especially popular at this age, because explaining a problem out loud is easier than typing it.
High school (grades 9 and 10)
GCSE, IGCSE, national board exams and high-school courses bring more content and more pressure. Algebra becomes quadratics and polynomials, science splits into physics, chemistry and biology, and numericals appear everywhere. Here TutorTwin focuses on method: how to set out a full-mark answer, which formula applies and why, and how to check a result before moving on.
Senior secondary (grades 11 and 12)
Calculus, vectors, organic chemistry, electromagnetism and genetics arrive, along with entrance exam preparation for many students. TutorTwin handles longer, multi-step problems, explains the reasoning behind each transformation, and can generate harder practice questions for students aiming high - whether for A-Levels, AP courses, the IB Diploma, CBSE and ISC boards or university entrance exams.
University and adult learners
First-year university students often need to revisit school foundations quickly - a calculus technique, a chemistry concept, a statistics method. Adults returning to study, or parents helping their children, use TutorTwin to refresh topics they last met years ago. Wherever you are starting from, a personal AI teacher meets you there.
Curricula and exam boards worldwide
Because TutorTwin works from the actual question you send, it is not locked to a single syllabus. Students following very different curricula use it the same way: photograph the question, ask, and learn the method.
International programmes
Students in international schools use TutorTwin with the International Baccalaureate (IB) Primary Years, Middle Years and Diploma Programmes, and with Cambridge IGCSE, AS and A-Level. It follows the command terms and mark-scheme style these programmes expect, so an explanation reads like a good model answer.
National curricula around the world
In the United States, students use it for Common Core maths and Advanced Placement (AP) courses; in the UK for GCSE and A-Level; in Canada for provincial curricula; in Australia and New Zealand for state certificates and NCEA; in India for NCERT, CBSE, ICSE/ISC and state boards; and elsewhere for the national curricula of the Gulf, Southeast Asia, Europe, Africa and Latin America. Maths, physics and chemistry look much the same the world over - a quadratic is a quadratic in New York, London, Dubai, Lagos, Singapore or Delhi - and TutorTwin follows the terminology, units and conventions of the curriculum your question comes from.
Test and entrance exam preparation
For standardised and entrance tests - the SAT and ACT, AP exams, GCSE and A-Level papers, IB exams, and competitive exams such as JEE and NEET - TutorTwin works through practice questions, explains why the wrong options are wrong, and generates similar questions for extra practice.
NCERT, CBSE, ICSE, IB, Cambridge, GCSE, AP, SAT, ACT, JEE and NEET are the trademarks or names of their respective owners. TutorTwin is an independent study assistant and is not affiliated with or endorsed by any exam board.
Languages
Students learn best when they can ask questions the way they naturally talk. TutorTwin replies in the language you write in - English, Spanish, French, Portuguese, Arabic, Hindi and most other widely spoken languages. Ask in Spanish and the explanation comes back in Spanish; ask in Arabic and it answers in Arabic. It even handles the mixed languages students really use: a Hinglish question like "yeh wala sum samajh nahi aaya, step by step samjhao" gets a helpful answer in the same style.
Technical terms stay the way your textbook uses them. If your subject is taught in English but you think more easily in another language, TutorTwin explains in your language while keeping the key terms in English - so you learn the words you will be examined on.
How TutorTwin teaches
An answer on its own teaches very little. TutorTwin is built around a few principles that come from how good human tutors work.
Steps, not just answers
By default, TutorTwin shows the full working: what the question is asking, which idea or formula applies and why, each step of the calculation, and a check at the end. The goal is that after reading it, you could solve a similar question on your own. When your own teacher expects a particular method, tell TutorTwin and it will use that method.
Hints when you want to try first
Sometimes you do not want the whole solution - you want a nudge. Ask for a hint and TutorTwin gives you one step at a time, waiting for you to try the next part before it continues. This is one of the most effective ways to learn, because you do the thinking and the tutor only steps in where you are stuck.
A second check when an answer looks doubtful
Maths and science answers must be right, and AI systems can make mistakes. When an answer looks doubtful, TutorTwin runs an additional check before replying, and if something still does not add up, it tells you plainly instead of presenting a guess as a fact. We would much rather a student hears "double-check this step" than copies a confident wrong answer into their notebook.
Practice and answer checking
Understanding a worked example is only the first step; the learning sticks when you solve problems yourself. Ask TutorTwin for more questions like the one you got wrong, or a short quiz on a chapter. Send back your answers and it checks them, explains any mistakes, and adjusts the next questions to what you need.
Memory of your conversation
TutorTwin keeps track of the conversation you are having, so you do not need to repeat the question when you ask a follow-up. That makes it feel less like a search box and more like a patient tutor who remembers what you were just working on.
Inside a solved doubt: three worked examples
The easiest way to understand how TutorTwin works as a homework doubt solver is to see the kind of explanation it gives. The three examples below show the structure of a typical reply: what is given, the idea that applies, each step of the working, and a check at the end. Real replies follow the same shape and adapt to your level and to follow-up questions.
Maths: solve 2x² − 7x + 3 = 0
What we have: a quadratic equation in the form ax² + bx + c = 0, with a = 2, b = −7 and c = 3.
Idea: factorise by splitting the middle term. We need two numbers that multiply to a × c = 6 and add to b = −7. Those numbers are −6 and −1.
- Split the middle term: 2x² − 6x − x + 3 = 0.
- Group in pairs: 2x(x − 3) − 1(x − 3) = 0.
- Take out the common bracket: (2x − 1)(x − 3) = 0.
- Set each bracket to zero: 2x − 1 = 0 gives x = ½, and x − 3 = 0 gives x = 3.
Check: for x = 3, 2(9) − 7(3) + 3 = 18 − 21 + 3 = 0. For x = ½, 2(¼) − 7(½) + 3 = ½ − 3½ + 3 = 0. Both roots work, so x = ½ or x = 3.
A typical follow-up: "How did you know to use −6 and −1?" - and TutorTwin explains how to list factor pairs of 6 and pick the pair whose sum is −7, then offers two more equations to try.
Physics: a car starts from rest and accelerates at 2 m/s² for 5 s
Given: initial velocity u = 0 m/s (it starts from rest), acceleration a = 2 m/s², time t = 5 s. Find: the final velocity v and the distance travelled s.
Idea: the acceleration is constant, so the equations of motion apply.
- Final velocity: v = u + at = 0 + (2)(5) = 10 m/s.
- Distance: s = ut + ½at² = 0 + ½ × 2 × 5² = 25 m.
Check with a third equation: v² = u² + 2as gives 10² = 0 + 2 × 2 × 25, and 100 = 100. The units are consistent (m/s for velocity, m for distance), and 25 m in 5 seconds from standstill is physically sensible.
Units, a clear list of what is given, and a sanity check are exactly the habits examiners reward - so TutorTwin shows them every time, not only when asked.
Chemistry: balance Fe + O₂ → Fe₂O₃
Idea: the same number of each type of atom must appear on both sides of the equation.
- Oxygen appears as O₂ on the left and O₃ inside Fe₂O₃ on the right. The lowest common multiple of 2 and 3 is 6, so aim for 6 oxygen atoms: 3O₂ on the left and 2Fe₂O₃ on the right.
- Two Fe₂O₃ contain 4 iron atoms, so put 4 in front of Fe.
- Balanced equation: 4Fe + 3O₂ → 2Fe₂O₃.
Check: iron - 4 on the left, 2 × 2 = 4 on the right. Oxygen - 3 × 2 = 6 on the left, 2 × 3 = 6 on the right. Balanced.
Ask "why not just write FeO₃?" and TutorTwin explains why you may only change the numbers in front of formulas, never the formulas themselves.
Every kind of question
Homework is not one kind of question, and a good homework doubt solver has to handle them all. Here is how TutorTwin approaches the most common types.
Multiple-choice questions
For a multiple-choice question, knowing which option is right is only half the job. TutorTwin explains why the correct option is correct and why each of the others is wrong - because in an exam the same idea will come back with different options, and eliminating wrong answers is a skill in itself.
Word problems
Many students can do the maths but get lost in the words. TutorTwin starts by translating the problem: what is known, what is being asked, and which quantities connect them. Only then does it set up the equation and solve it. Over time, this teaches students to break down word problems on their own.
Proofs and derivations
Geometry proofs, trigonometric identities and physics derivations need every line justified. TutorTwin writes them out line by line with the reason for each step, the way an examiner expects, and explains the strategy - why we started from the left-hand side, or why we drew that construction line.
Diagrams, graphs and tables
Photograph a circuit diagram, a graph of motion, a labelled biology diagram or a data table, and TutorTwin reads the information from the image and works with it. It can also describe how to draw a diagram you need for an answer, step by step.
Short and long written answers
For theory questions in science, social studies, economics or English, TutorTwin helps you structure an answer: the key points to include, the terms examiners look for, and a sensible order. For essays and projects it helps you plan, understand and improve your own writing - it is a tutor, not a ghost-writer.
"Explain this topic to me"
Sometimes the doubt is not a single question but a whole topic that never clicked. Ask TutorTwin to teach it from the beginning. Like a personal AI teacher, it starts with the core idea, builds up with examples, checks your understanding with a quick question, and moves on only when you are ready.
The learning science behind TutorTwin
TutorTwin's design follows a handful of ideas about how people learn that are widely accepted among teachers and education researchers. None of them are new - good tutors have always worked this way - but an always-available personal AI teacher makes them far easier to practise every day.
Worked examples, then independent practice
When a topic is new, studying a fully worked example is one of the most efficient ways to learn the method. Once the method is understood, the learning moves to solving similar problems yourself. TutorTwin mirrors that progression: a clear worked solution first, then "try these two" practice questions, then feedback on your answers.
Retrieval practice
Recalling an idea from memory - by answering a question rather than re-reading notes - strengthens it far more than passive review. That is why TutorTwin encourages quizzes and practice questions instead of only producing answers. A five-question quiz on a chapter does more for exam performance than reading the chapter again.
Immediate feedback
Mistakes are most useful when they are corrected quickly, before a wrong method becomes a habit. Because TutorTwin checks your answer as soon as you send it, and points to the exact step where things went wrong, you fix misunderstandings the same evening instead of discovering them in a test weeks later.
Spaced practice
Coming back to a topic after a few days, rather than cramming it once, makes it stick. Because your earlier explanations stay in your WhatsApp chat, it is easy to revisit a topic later and ask TutorTwin for a fresh set of questions on it.
Asking questions without fear
Many students do not ask questions in class because they worry about looking slow. A private chat with a patient personal AI teacher removes that pressure. The questions students were too shy to ask aloud are often exactly the ones that unlock a topic.
Exam preparation and revision
Homework is daily; exams are where it all comes together. TutorTwin is useful in the weeks before a test as much as on an ordinary school night.
Revise chapter by chapter
Ask TutorTwin to summarise a chapter into key points, list the formulas you need to know, or explain the ideas that most often confuse students. Then ask for a short quiz on that chapter. Your answers are checked, and anything you got wrong is explained - which shows you exactly where to focus your remaining revision time.
Work through past papers
Photograph or send a PDF of a past paper, attempt a question, and send your working. TutorTwin checks it step by step, points out where marks would be lost, and shows how a full-mark answer is set out. For board exams, IB, IGCSE and A-Level papers, seeing how an answer should be structured is often worth as much as knowing the content.
Last-minute doubts
The night before an exam, doubts always appear. With a personal AI teacher on WhatsApp, a last-minute doubt takes a photo and a minute to clear, instead of a sleepless night of worrying about it.
Keep calm and keep practising
Exam stress often comes from feeling unprepared. Regular practice with instant feedback builds genuine confidence. Ask TutorTwin for a few questions a day on your weakest topics, and watch them turn into strengths.
Real ways students use TutorTwin
Every student uses their homework doubt solver a little differently. Here are some of the most common patterns.
- The 11pm maths doubt. One quadratic, one integral or one proof will not give way. A photo to TutorTwin and a step-by-step explanation later, homework is done - and understood.
- The physics numerical that keeps going wrong. The student sends their own working with "I got 24 m/s but the answer is 12", and TutorTwin spots the missing factor of two.
- The long worksheet. A 10-page PDF arrives from school. The student asks only about the three questions they could not do.
- The chapter that never made sense. Instead of a single question, the student asks TutorTwin to teach the topic from the beginning, with examples, like a personal AI teacher would.
- The voice-note learner. A younger student who finds typing slow simply explains the question out loud and reads the written answer.
- The international school student. An IB student in Singapore, an AP student in Texas or a CBSE student in Dubai gets help in the terminology of their own syllabus, in their own language, at any hour in their own time zone.
- The pre-test sprint. A student asks for a ten-question quiz on the chapter, checks their answers, and revises only what they got wrong.
A sample study week with TutorTwin
A personal AI teacher is most powerful when it becomes a habit rather than an emergency tool. Here is one way a secondary-school student might fit TutorTwin into an ordinary week. Adapt it to your own timetable.
- Monday - clear the weekend's doubts. Send the questions you marked as "stuck" while doing weekend homework, one at a time, and ask about any step you do not follow.
- Tuesday - practise the weakest topic. Ask for five questions on the topic from Monday that gave you the most trouble. Solve them, send your answers, and read the feedback.
- Wednesday - homework as usual. Use TutorTwin only when genuinely stuck, and try a hint before asking for the full solution.
- Thursday - teach-back. Explain a topic to TutorTwin in your own words, by text or voice note, and ask it to point out anything you missed or got wrong. Explaining is one of the best tests of understanding.
- Friday - quick quiz. Ask for a ten-question quiz covering the week's lessons across two subjects. Note which questions you got wrong.
- Weekend - revisit and rest. Scroll back through the week's chat, re-read two explanations, and redo the quiz questions you missed. Then take a proper break.
Fifteen to thirty focused minutes a day with a patient study buddy adds up to a lot of understanding over a term - and far fewer late-night panics before exams.
A tutor named by you
When you sign up, you choose the name your tutor answers to. Many students pick the name of a favourite teacher - "Mrs Johnson", "Señora López", "Miss Fatima", "Anita Ma'am" - because it makes asking for help feel familiar and a little less intimidating. Others choose a fun name, or simply leave it as TutorTwin.
We are careful about one thing: TutorTwin is a persona, never an impersonation. It answers to the name you choose and adopts a friendly, supportive teaching style, but it never claims to be that person. On an AI-only plan it also never suggests a human is reading - because none is. On a HumanAI Tutors plan a real teacher does read, and the assistant says so plainly: it still answers as an AI, and anything the teacher writes arrives marked as from them. Either way this is built into how the tutor is configured, not just stated on this page. Students deserve to know exactly what they are talking to.
If you renew later, your tutor keeps the name you gave it. Nothing resets from one plan to the next.
There is also a HumanAI Tutors plan, where you pick a real teacher instead of a name. An AI study assistant set up in that teacher's teaching style answers 24x7 - it is still an AI and still says so - and the teacher reads your chats and replies in the same chat when you ask for them or keep getting stuck. You agree to that teacher reading your chats before you pay.
HumanAI Tutors: the AI with a real teacher
Every honest AI tutor runs into the same wall. It will explain a topic at two in the morning for the fifteenth time without a sigh, and it will never notice that a student has gone quiet for a week, never decide that the real problem is last year's work rather than this week's, and never care whether they pass. Those are the things a person does.
So we sell both, in one chat. HumanAI Tutors pairs a real, named teacher with an AI study assistant set up in that teacher's teaching style. The assistant takes the ordinary questions, at any hour, in the same WhatsApp chat as before. The teacher reads those chats, so by the time they step in they already know what you have been stuck on - nobody has to explain the last three days.
Who is answering, across a day
On both products the assistant answers every hour of the day. What a HumanAI plan adds is a real teacher reading that same chat and stepping in - when they can, which is why their band has no fixed edges.
In words: on an AI-only plan the assistant answers for all twenty-four hours. On a HumanAI plan the assistant still answers for all twenty-four hours, and a real teacher additionally reads the chat and replies when they are able to. No response time is guaranteed.
What actually happens
- You browse the teachers, read their profile and qualifications, and choose one. The price is theirs, shown on their card before you pay.
- Before you pay, you agree that this teacher may read your chats. Nothing is linked until you do.
- The assistant answers in your chat 24x7, in that teacher's style. It says it is an AI, because it is.
- Type ask my teacher and the teacher is alerted. They are also alerted when the AI notices you are stuck on the same thing repeatedly.
- Their reply arrives in the same chat, marked as from them. Voice notes, worksheet PDFs and photos travel both ways.
- A teacher can set you practice or a test, and you send DONE when you have finished it.
What happens to one question
The first four steps happen on every plan, usually in seconds. The last two exist only on a HumanAI plan, and only when the assistant is not enough on its own.
- You ask
Typed, photographed, recorded, or a whole worksheet PDF.
- The assistant works it through
It reads the page, follows the conversation so far, and solves it a step at a time.
- It checks itself
A doubtful answer is put to a second model before you ever see it.
- You get the steps
In the same WhatsApp chat, in the language you wrote in.
- Your teacher is alerted
When you type "ask my teacher", or when that self-check did not hold up.
HumanAI plans only - They reply as themselves
In the same chat, marked as from them - never as the AI.
HumanAI plans only
What we do not promise
A teacher is a person, not a server. They answer when they can, and we do not promise a reply within any particular time - the AI is what covers the hours in between. Teachers take a limited number of students on purpose, so that reading the chats is something they can actually do; when a teacher is full, their card says so. And because a child's contact must stay somewhere we can see it, phone numbers, email addresses and links to other chat apps are blocked in both directions.
Teachers: bring your own students
If you already teach, you can run your students on TutorTwin instead of buying for each of them. A teacher plan gives you a pool of student seats and a monthly allowance, a portal that shows every student's chat, tools that draft a worksheet or a lesson plan, and a weekly report you can add a note to before it goes to the parent. A student who later buys their own plan keeps it, and your seat is handed back. The plans are on the teachers page.
For parents
Parents are often the ones who find TutorTwin and sign up, and we have tried to make it straightforward and trustworthy for families.
Help at the times tutors are not available
Private tutoring is valuable, but it is scheduled, and homework questions rarely wait for the next session. TutorTwin is there in the evenings, at weekends, during holidays and the night before an exam - the times when a stuck student is most likely to give up or copy an answer. Many families use it alongside school and tutoring, not instead of them.
Learning, not copying
A common worry is that an AI will simply do the homework. TutorTwin is designed to explain the method step by step, to offer hints instead of answers when asked, and to set practice questions, so the student builds real understanding. Like any tool, it is most useful when used well; we encourage parents to talk with their children about using it to understand, not to copy.
Simple, predictable pricing
Plans are prepaid for 1 month, 3 months or a year, in three tiers. What each tier includes is listed on its card, there are no per-question charges, and there is no automatic renewal - you decide whether to continue. TutorTwin sends a reminder on WhatsApp before the plan ends.
Your contact details, separately
The tutor runs on the student's WhatsApp number, but when you sign up you can add a separate contact number for a parent. That keeps the student's chat for studying while giving the family a way to be reached about the account.
For students around the world
Homework is the same everywhere, and so is WhatsApp. TutorTwin is built for students in every country - from North and South America to Europe, the Middle East, Africa, Asia and Oceania - with one product, one price in your own currency, and help in your own language and curriculum.
One tutor, any country
For any student with a WhatsApp account, TutorTwin works the same way: send a question, get the steps. There is no regional app store restriction and no country lock, because there is no app. Your tutor follows the curriculum your question comes from and replies in the language you write in.
International and expat families
Families who move between countries often have children switching curricula - from a national system to IB, from GCSE to AP, from CBSE to IGCSE. TutorTwin understands all of them, so a student keeps the same patient study buddy through every move, and parents can follow along in the language they are most comfortable with.
Help in every time zone
TutorTwin is available around the clock, so it is there at whatever hour homework happens where you live - after school in Los Angeles, late evening in London, or the night before a test in Sydney.
Pay in your own currency
When you choose your country on the pricing section or sign-up page, prices are shown in your local currency for many countries - including US dollars, British pounds, euros, UAE dirhams, Saudi riyals, Qatari riyals, Canadian, Australian, New Zealand, Singapore and Hong Kong dollars, Malaysian ringgit, Swiss francs, South African rand and Indian rupees. Everywhere else, prices are shown in US dollars. You pay the amount you see, by international card, with no surprise conversion at checkout.
Enter your number with your country code
When you sign up, enter your WhatsApp number starting with "+" and your country code - for example +1 for the US and Canada, +44 for the UK, +61 for Australia, +971 for the UAE or +91 for India - so your tutor can reach you.
TutorTwin in your country
TutorTwin is the same product everywhere - a homework doubt solver and personal AI teacher on WhatsApp - but students in different countries use it with different curricula and pay in different currencies. Here is what to expect where you live.
United States
Middle and high school students use TutorTwin for Common Core maths, algebra, geometry, precalculus and calculus, biology, chemistry and physics, and AP courses, as well as SAT and ACT maths practice. Prices are shown in US dollars and you pay by card.
United Kingdom
GCSE, IGCSE and A-Level students use TutorTwin for maths, further maths, and the sciences, including worked answers to past-paper style questions. Prices are shown in pounds sterling.
Europe
Students in national and international schools across Europe - from Ireland, France, Germany, Spain, Italy and the Netherlands to Switzerland and beyond - use TutorTwin for maths and the sciences, including the IB and national school-leaving exams. Prices are shown in euros across the eurozone and in Swiss francs in Switzerland.
UAE, Saudi Arabia, Qatar and the Middle East
The Gulf is home to schools following British, American, IB, Indian and national curricula, often side by side in one city. TutorTwin handles all of them for students in Dubai, Abu Dhabi, Riyadh, Jeddah, Doha, Muscat, Kuwait City and beyond, and replies in Arabic or English. Prices are shown in dirhams in the UAE, riyals in Saudi Arabia and Qatar, and US dollars elsewhere in the region.
Canada
Students following provincial curricula - from Ontario and British Columbia to Alberta and beyond - use TutorTwin for maths and science homework. Prices are shown in Canadian dollars.
Australia and New Zealand
Students on the Australian Curriculum, state certificates such as the HSC and VCE, and New Zealand's NCEA use TutorTwin for maths and science. Prices are shown in Australian or New Zealand dollars.
Singapore, Malaysia and Southeast Asia
Students preparing for national examinations and international qualifications use TutorTwin for maths and sciences. Prices are shown in Singapore dollars or Malaysian ringgit, and in US dollars elsewhere in the region.
India and South Asia
Students use TutorTwin with NCERT textbooks and CBSE, ICSE/ISC and state board syllabuses, and for JEE and NEET practice, with explanations in English, Hindi or Hinglish. Prices are shown in rupees in India, where UPI, net banking and wallets are accepted alongside cards, and in US dollars elsewhere in South Asia.
Africa
From South Africa and Nigeria to Kenya, Ghana and Egypt, students following national curricula, Cambridge and IB programmes use TutorTwin for maths and science - WhatsApp is how many of them already talk to classmates. Prices are shown in rand in South Africa and in US dollars elsewhere.
Latin America
Students across Mexico, Brazil, Colombia, Argentina, Chile and the rest of Latin America can ask in Spanish or Portuguese and get the explanation in the same language, for national curricula and international programmes alike. Prices are shown in US dollars.
Everywhere else
If WhatsApp works where you are, TutorTwin does too. Wherever you study, prices are shown in your own currency where checkout supports it and in US dollars everywhere else.
For teachers and tutors
TutorTwin is not built to replace teachers. It is built to catch the questions that arrive when teachers are not there, and to send students back to class better prepared.
Fewer stuck students, better lessons
When a student can clear a routine homework doubt the same evening, they arrive at the next lesson ready to move on instead of still stuck on last week's exercise. Class time can go to the deeper questions that genuinely need a teacher's judgement.
Consistent with how you teach
Students can tell TutorTwin which method their teacher uses, and it will follow that method. It uses standard textbook terminology, shows full working and encourages students to practise, so it reinforces good habits rather than shortcuts.
A companion to private tutoring
For private tutors, TutorTwin covers the days between sessions. Students keep practising, arrive with a clear record of what they worked on in their WhatsApp chat, and use session time for the topics that need a human. NXTutors itself connects families with human tutors, and we see the two working best side by side.
Teacher plans: run your own students on TutorTwin
The section above is about what TutorTwin does around your teaching. This one is about using it as your own tooling. A teacher plan turns TutorTwin into something you operate: your students, in their own WhatsApp chats, with an assistant that answers in your teaching style, and a portal where you read everything and step in whenever you want to.
It is deliberately not a marketplace. Nobody is sent to you, and buying a plan does not list you on the HumanAI Tutors page - that is a separate arrangement our team sets up. You bring the students you already teach.
Your login comes first, and it is free
You do not pay to find out whether this works for you. You create your login before any money changes hands: enter the WhatsApp number your teacher account uses, press Send code, and type the code we message you along with the email and password you want. Possession of the number is the proof, because a teacher's number is not a secret - it is the one she gives her students. The code lasts fifteen minutes, works once, and allows five attempts before it is burnt.
Payment then happens inside the portal, under My plan, where you are signed in. That matters more than it sounds: the order is raised for whoever holds the session, so it can never be aimed at somebody else's account by typing their phone number into a public form.
Seats and credits, in plain words
Two numbers decide what a plan can do. A seat is one student: you add them by WhatsApp number from the portal and they get the assistant for as long as your plan runs, paying nothing and installing nothing. A credit is one AI answer - three when a harder model or the answer-checker has to run. Credits are pooled across your students and capped per student, so one student cannot drain the month in an afternoon.
Worksheets, lesson plans and the practice you assign come out of the same pool. A student replying DONE to a task costs nothing at all. If the pool empties, the assistant stops answering until the cycle resets or you buy a credit pack - and students who pay for their own plan are never affected by your pool.
Seats move. Release one in the portal and add somebody else, up to one swap per seat per month, so a plan cannot quietly serve ten times the students it was sold for. And if a seated student later buys their own subscription, they keep it, they stay linked to you, and the seat returns to your pool automatically - that costs you nothing and does not count as a swap.
What the portal actually does
- Every student's chat, from the day you added them - the real conversation, with the photos, PDFs and voice notes in it. Voice is transcribed, so you can read a question instead of playing it.
- Reply as yourself, from the portal or straight from your own WhatsApp. Your message lands in the student's chat marked as from you, never as the AI.
- Send files back - a worked solution photographed off your notebook, a PDF of practice, a voice note talking a student through a step. If the student is outside WhatsApp's 24-hour reply window we send a notice and deliver your file the moment they write back.
- Alerts when a student needs you: when they ask for you, and when the assistant is not confident in its own answer. A second ask within half an hour joins the same alert, so you see one clear request rather than five.
- Worksheet generator and lesson plans - give it a topic, a board or grade, a difficulty and a count.
- Practice and tests you assign, with a due date, a reminder the evening before, and a DONE from the student when it is finished.
- A weekly report to the parent each Sunday: questions asked, subjects covered, tasks completed, and your own note if you left one.
The limits, and why they exist
You see your own students and only from the day you added them - never another teacher's students, and never a word from before the link began. Their phone numbers are masked: you get a name and a chat, not a contact you could take off the platform. Phone numbers, email addresses and links to other chat apps are blocked in both directions, including a number split across two messages to get around it, because a conversation with a child has to stay somewhere we can see it. There are caps on messaging too - up to twenty relayed messages per student per day, and at most two notices a day to a student outside the reply window.
Every student is told, before they are added, that you can read and reply. That is why the portal makes you confirm the student or their parent agreed, and why that confirmation is recorded. And the assistant is always an AI: it says so, it works in your teaching style, and it never signs as you.
Plans are sold by length rather than by size - one month, three months or six, each carrying the same seats, the same credit pool and the same tools. Nothing renews by itself; there is no standing instruction on your card. Buying again while a plan is still running adds the new term onto the end, so you never lose days you have paid for. The current prices are on the teachers page.
Accessibility and inclusion
Good help with homework should not depend on where a student lives, how much their family can spend on tuition, or which phone they own. Several of TutorTwin's design choices come from that belief.
- No new app, any phone. TutorTwin works through WhatsApp, which runs on basic Android phones, iPhones, WhatsApp Web and the desktop app.
- Light on data. Text replies are tiny, and a photo of a question is small to send, so it works on limited mobile data plans.
- Voice for those who find typing hard. Younger students, and students who struggle with typing or spelling, can simply speak their question.
- Your language. TutorTwin replies in the language you write in - English, Spanish, French, Arabic, Hindi, Hinglish and more - so students can learn in the language they think in.
- A fraction of the cost of tuition. A fixed monthly plan with no per-question fees costs far less than regular private tutoring, and longer plans cost less per month.
- Every time zone. For students abroad, help is available at whatever hour homework happens where they live.
Plans, pricing and payment
TutorTwin keeps pricing simple. There is one product with every feature included, sold in three lengths.
- 1 month - try TutorTwin for a term, an exam season or a difficult chapter.
- 3 months - our most popular plan, covering most of a school term.
- 1 year - the best value per month, at roughly half the monthly rate, for steady support through the school year.
Every plan gives step-by-step solutions, practice questions and answer checking with no per-question charges. Each card lists that tier's monthly allowance and what it covers: photos, PDFs, voice notes and mock tests are on Pro and Elite, and Elite covers all eight subjects rather than one. Current prices - in your own currency - are always shown in the pricing section of the home page. From time to time we run discounts, which appear there automatically.
Secure payment by Razorpay
Payments are handled by Razorpay, a widely used payment gateway. You can pay by international debit or credit card in your local currency from anywhere in the world; in India, UPI, net banking and wallets are also available. TutorTwin never sees or stores your card details.
No auto-debit, and renewals never cost you days
Plans are prepaid and do not renew automatically. Before your plan ends, TutorTwin sends you a reminder on WhatsApp. If you renew early, the new plan is added to the end of your current one, so you never lose days you have already paid for.
Honesty, safety and privacy
An education product is only useful if students and parents can trust it. These are the commitments we build TutorTwin around.
The AI says it is an AI, and the teacher is a real person
Every answer in a TutorTwin chat is written by an AI, and an AI can make mistakes. It never claims to be human or to be the person it is named after. For anything important - a graded assignment, an exam answer, a formula you will rely on - use TutorTwin to understand the method and check the result against your textbook or teacher.
On a HumanAI Tutors plan there is also a real teacher, and we are equally plain about them. They are a named person with a profile you read before you paid. They can see your conversation from the day you chose them, never before it, and never your full WhatsApp number. Their messages arrive labelled as theirs. They answer when they can - we do not promise a reply time, because a person is not a server. Nothing you send is ever read by a teacher you did not choose.
Careful rather than confident
When TutorTwin cannot read a photo clearly, it asks for a better one. When an answer looks doubtful, it double-checks, and if doubt remains, it says so. This is a deliberate design choice: a tutor that admits uncertainty is far more useful than one that is confidently wrong.
Your messages
Your subscription is linked to your WhatsApp number, and your messages are used to answer your questions and keep the context of your conversation. By default, the text of students' messages is not written to our service logs. Payments are processed by Razorpay, so we never see card details. If you have a question about your data or would like it deleted, email support@nxtutors.com.
Academic integrity
TutorTwin is a tutor, not a way around learning. It is designed to explain, give hints and set practice - the things that build real understanding. We encourage students to follow their school's rules on using AI, and to use TutorTwin to learn the method so they can do the work themselves.
TutorTwin compared with other options
TutorTwin comes in two forms, and they compare differently. Here is how each one sits against the other places students turn to for help.
| TutorTwin AI | HumanAI Tutors | Private tutor | Homework apps | General AI chatbots | |
|---|---|---|---|---|---|
| Available at any hour | Yes | Yes - the AI answers; the teacher when free | Scheduled sessions | Yes | Yes |
| Nothing to install | Yes - uses WhatsApp | Yes - uses WhatsApp | Yes | No - separate app | Usually an app or website |
| Photo, PDF and voice questions | All three | All three, both ways | In person | Often photo only | Varies |
| Step-by-step teaching by default | Yes, with hints on request | Yes, in your teacher's style | Yes | Often answers only | Depends how you ask |
| Built for school curricula | Yes | Yes | Yes | Varies | General purpose |
| Answers in your own language | Yes | Yes | Depends on tutor | Varies | Varies |
| Cost | Fixed monthly plan | Fixed monthly plan, set by the teacher | Per hour, usually highest | Free to subscription | Free to subscription |
| Human judgement and mentoring | No - it is an AI | Yes - a named teacher reads and steps in | Yes | No | No |
The honest summary: a person offers judgement, motivation and mentoring no AI can match, and an AI offers patience and availability no person can. That is the whole argument for HumanAI Tutors - the assistant takes the 11pm question and the hundredth repetition, the teacher takes the ones that need a human, and you pay for one thing instead of two.
Myths and facts about AI tutors
AI tutors are new to many families, and a few misunderstandings come up again and again. Here are the most common, answered honestly.
Myth: "An AI tutor just does the homework for you."
Fact: it depends on how it is built and how it is used. TutorTwin is designed to explain the method step by step, to give hints when you want to try yourself, and to set practice questions. Used that way, it builds understanding. We encourage students to use it to learn, and parents to talk with their children about using it well.
Myth: "AI is always right."
Fact: AI can make mistakes. TutorTwin double-checks answers that look doubtful and tells you when something does not add up, but no AI is perfect. The best habit is to follow the reasoning, not just the final number, and to check anything that matters for marks.
Myth: "AI tutors will replace teachers."
Fact: teachers provide judgement, motivation, mentoring and care that software cannot. An AI tutor is most useful for the questions that come up when a teacher is not available. The two work best together.
Myth: "You need a powerful phone and a fast connection."
Fact: TutorTwin works through WhatsApp, which runs on modest phones and patchy mobile data. A photo and a text reply are small.
Myth: "AI tutors only work in English."
Fact: TutorTwin replies in the language you write in - English, Spanish, French, Arabic, Hindi, Hinglish and many more - so students can learn the way they think.
Myth: "It is only for top students - or only for struggling ones."
Fact: a patient study buddy helps everyone. A student who is behind catches up without embarrassment; a student who is ahead can ask for harder problems and explore topics beyond the syllabus.
Getting the best answers
A few habits make TutorTwin noticeably more helpful.
- One question at a time. If a photo shows several questions, say which one you want: "Q4 please".
- Clear photos. Good light, page flat, whole question in frame. Avoid shadows across numbers.
- Say what you tried. "I got 12 but the answer is 8" helps TutorTwin find exactly where you went wrong.
- Mention your level or board. "GCSE Higher", "AP Calculus", "IB HL" or "Class 10 CBSE" helps it pitch the explanation right.
- Ask for a hint first. Try the problem with a nudge before reading the full solution - you will remember it better.
- Finish with practice. "Give me two more like this" turns one solved question into a skill.
- Ask why. If a step feels like magic, ask about it. There is no limit on follow-up questions.
Our story and mission
NXTutors began by connecting students with human tutors. Over time, one pattern kept repeating: the moment a student most needed help was rarely the moment their tutor was available. Questions piled up between sessions, and the hardest part of learning - being stuck on your own - happened with nobody to ask.
We asked a simple question: what if every student had a patient, knowledgeable study buddy in the app they already open fifty times a day? Not another app to install, not a website to log into, but a chat on WhatsApp that answers at 11pm with the steps instead of just the answer. TutorTwin is our answer to that question.
Our mission is simple: no student should stay stuck on a question. We want every student - in a big city or a small town, in any country in the world - to have a personal AI teacher that clears their doubts, explains the reasoning, and helps them practise until the topic makes sense. And we want to do it honestly: clear about being an AI, careful about accuracy, and focused on real learning rather than shortcuts.
We are still early, and we keep improving TutorTwin based on how students actually use it. If you have an idea, a question or feedback, we would genuinely like to hear it at support@nxtutors.com.
Who makes TutorTwin
TutorTwin is a product of NXTutors Edtech Pvt Ltd, an education company headquartered in India that serves students worldwide. NXTutors works with students, parents and tutors, and TutorTwin brings that experience to the moments between lessons - so that no student has to stay stuck on a question just because it is late or their tutor is busy.
You can reach us directly:
- Company: NXTutors Edtech Pvt Ltd
- Address: BLK-2/49, M3M Cosmopolitan, off Golf Course Extension Road, Sector 66, Gurugram, Haryana 122101, India
- Email: support@nxtutors.com
- Phone: +91 78360 34313
- Website: www.nxtutors.com
Glossary of study terms
A few terms used on this page and in TutorTwin's explanations, explained simply for students and parents in every country.
- Doubt
- A question or concept a student is stuck on. Common in South Asian and Middle Eastern English - "I have a doubt in question 5" - and the reason TutorTwin is often called a homework doubt solver.
- Doubt solver
- A tool or service that helps students clear their doubts. TutorTwin is a doubt solver that explains the reasoning step by step rather than only giving the final answer.
- Personal AI teacher
- An AI tutor that works one-to-one with a single student, available whenever they need it and adapting explanations to their level.
- Worked solution
- A solution that shows every step of the working, not just the answer, so the method can be learned and reused.
- Hint
- A small nudge towards the next step, given instead of the full solution so the student does the thinking.
- Retrieval practice
- Learning by recalling information from memory - for example, by answering quiz questions - rather than by re-reading notes.
- Numerical
- A calculation-based question, especially in physics and chemistry, where the answer is a number with units.
- Board exams
- National or state-level school examinations, such as those at the end of grades 10 and 12 in India set by CBSE, CISCE (ICSE/ISC) and state boards, and their equivalents in other countries.
- IB, IGCSE, GCSE, A-Level and AP
- International and national qualifications: the International Baccalaureate, Cambridge IGCSE, the UK's GCSE and A-Level, and the US Advanced Placement programme. TutorTwin helps with questions from all of them.
- Common Core
- The US standards for school maths and English that most American state curricula are built on. TutorTwin follows its methods for US students.
- Hinglish
- A natural mix of Hindi and English, widely spoken by students in India and by Indian families abroad. TutorTwin understands and replies in Hinglish.
- Prepaid plan
- A subscription paid in advance for a fixed period - 1 month, 3 months or a year for TutorTwin - that does not renew or charge automatically.
- OCR
- Optical character recognition: the technology that reads text and handwriting from a photo. TutorTwin uses it, together with image understanding, to read the questions you photograph.
Terms and conditions
1. The service
TutorTwin is a study service delivered through WhatsApp. It answers study questions sent as text, photos, PDFs and voice notes. It is sold in two forms:
- TutorTwin AI - an AI study assistant, and nothing else. No human reads or answers these conversations except our staff, and only for support, safety or a legal obligation.
- HumanAI Tutors - the same AI assistant, set up in a named teacher's teaching style, plus that real teacher. The teacher can read the student's conversation and reply in it. The assistant is still an AI and never claims to be the teacher; messages the teacher sends are marked as theirs.
In both forms the answers are generated by an AI system. TutorTwin does not replace school, and it is not professional advice.
2. Accuracy
We work to make TutorTwin accurate and careful, but AI can make mistakes. Answers are provided for learning purposes only, without any guarantee of correctness, completeness or exam results. You are responsible for checking important answers and for how you use them.
3. Eligibility and accounts
A subscription is linked to one WhatsApp number and is for use by one student. If the student is under 18, a parent or guardian must agree to these terms, set up the subscription or give permission for it, and supervise its use. You must provide a WhatsApp number that you are entitled to use.
4. HumanAI Tutors: buying AI with a named teacher
These terms apply in addition to the rest when you buy a plan with a named teacher.
- Consent. Before the teacher is linked, the student - or, for a student under 18, their parent or guardian - must agree that the teacher may read that student's conversation. That agreement is recorded with the order. Without it we do not link a teacher.
- What the teacher sees. Only the conversations of students linked to them, only from the date the link started, and never the student's full WhatsApp number.
- No guaranteed response time. The AI assistant answers at any hour. The teacher is a person: they reply when they can, and we do not promise a reply within any particular time. Fair-use limits apply to messages relayed between a student and a teacher.
- If a teacher becomes unavailable. A teacher may stop taking students, or we may stop working with one. If that happens during a paid plan we will offer you another teacher or a pro-rata refund of the unused period. The AI assistant continues in the meantime.
- Contact stays on TutorTwin. Teachers and students must not exchange personal phone numbers, email addresses or links to other messaging apps. Messages containing them are refused automatically. Contact arranged off TutorTwin is outside this agreement and outside our safeguarding.
- Teachers buying seats. A teacher may buy a plan that includes a number of student seats and a monthly allowance of AI usage. Seats may be moved between students within the monthly limit shown on the plan. A seat gives that student access for as long as the teacher's plan runs, and ends with it. A student who buys their own plan keeps it independently of any teacher.
- Teachers are independent. A teacher on TutorTwin is not our employee. We are responsible for the platform; the teaching a teacher gives is their own.
5. Plans and payment
- TutorTwin is sold as prepaid plans (for example 1 month, 3 months or a year). The price, currency and duration are shown before you pay.
- Payments are processed by Razorpay. We do not receive or store your card details.
- Plans do not renew or charge automatically. Buying a new plan before the current one ends adds the new period after the current one.
- Access starts when the payment is confirmed and ends when the plan period ends.
6. Billing problems and refunds
If you were charged but your tutor did not start, or you were charged more than once, contact support@nxtutors.com with your WhatsApp number and payment reference and we will investigate and resolve it. Refunds for duplicate charges or failed activations are returned to the original payment method. Other refund requests are considered case by case and in line with applicable consumer law.
7. Acceptable use
You agree not to:
- use TutorTwin for anything unlawful, harmful, abusive or harassing;
- send content that is illegal, sexually explicit, or infringes others' rights;
- use it to cheat in exams or assessments where AI assistance is not allowed, or to break your school's rules;
- share, resell or automate access to your subscription, or try to overload, reverse-engineer or disrupt the service.
We may apply fair-use limits to protect the service, and we may suspend a subscription that breaks these terms.
8. Your content
You keep ownership of the questions, photos, documents and voice notes you send. You give us permission to process them to provide and improve the service, as described in the privacy policy below.
9. Our content
The TutorTwin name, logo, website and software belong to NXTutors. You may use the explanations TutorTwin gives you for your own personal study.
10. Availability
We aim to keep TutorTwin available at all times, but it depends on third-party services, including WhatsApp, payment providers and AI model providers, and may occasionally be interrupted for maintenance or reasons beyond our control.
11. Limitation of liability
To the extent permitted by law, NXTutors is not liable for indirect or consequential losses, or for decisions made on the basis of TutorTwin's answers, and our total liability for any claim is limited to the amount you paid for the plan in question. Nothing in these terms limits rights you have under consumer law that cannot be excluded.
12. Changes
We may update these terms from time to time. The date at the top shows the latest version. Changes do not affect a plan you have already paid for, except where required by law.
13. Governing law and contact
These terms are governed by the laws of India, and the courts of Gurugram, Haryana have jurisdiction, without affecting any mandatory consumer rights in your country of residence. Questions: NXTutors Edtech Pvt Ltd, BLK-2/49, M3M Cosmopolitan, Sector 66, Gurugram, Haryana 122101, India · support@nxtutors.com · +91 78360 34313.
Privacy policy
1. What we collect
- Sign-up details: the student's name, WhatsApp number, an optional contact number, the tutor name you choose, main subject and optional city.
- Consent record (HumanAI Tutors only): which teacher was chosen, and the date and time the student or guardian agreed that teacher may read the conversation.
- Study content: the messages, photos, PDFs and voice notes you send, and TutorTwin's replies.
- Payment records: plan, amount, currency, order and payment references, payment method type and time. Card and bank credentials are handled by Razorpay and never reach us.
- Technical data: basic service logs needed to run and secure the service. By default, the text of students' messages is not written to these logs.
2. How we use it
- to answer questions and keep the context of your conversation;
- to activate, manage and renew your subscription, and send service messages such as activation and plan-ending reminders on WhatsApp;
- to process payments and keep the records required by law;
- to keep the service safe, prevent abuse, and fix problems;
- to understand how TutorTwin is used and improve its quality.
We do not sell your personal data, and we do not use it for third-party advertising.
3. Who we share it with
Only with service providers who help us run TutorTwin, under their own security and privacy obligations:
- Meta (WhatsApp Business Platform) - to send and receive messages;
- Razorpay - to process payments;
- AI model providers - to generate answers and to read photos, documents and voice notes;
- Cloud hosting and storage providers - to run the service and store data securely.
Your chosen teacher (HumanAI Tutors only). If you bought a plan with a named teacher, or a teacher added you to one of their seats, that teacher is a real person who can read your conversation. Our lawful basis is the consent recorded at sign-up - or, for a seat, the teacher's attestation that you agreed - and it is the point of the product rather than a side effect. Specifically, that teacher can see the messages in your conversation from the date the link started onwards, never anything before it, and your WhatsApp number only in a masked form. They cannot see your payment details. They are bound by confidentiality and may only use what they see to teach you. When the link ends their access ends with it: they keep no copy, and the conversation stays yours under the retention rules below. AI-only students have no teacher, and nobody outside our staff reads those conversations.
We may also disclose data when required by law or to protect the rights and safety of students and others. Some providers process data outside your country; where they do, we rely on their contractual and security commitments.
4. Children
TutorTwin is used by school students. Where a student is under 18, we rely on a parent or guardian to set up or permit the subscription. Parents may contact us to review or delete their child's data. Where a plan includes a named teacher, the parent or guardian must also agree that the teacher may read the student's conversation, and may withdraw that agreement at any time by emailing us - the teacher is unlinked and the AI-only service continues.
5. How long we keep it
Conversation content is kept while your subscription is active and for a reasonable period afterwards so you can renew and continue, unless you ask us to delete it sooner. Payment records are kept for as long as tax and accounting law requires.
6. Security
We use encryption in transit, access controls and audited administrative access to protect your data. No system is completely secure, but we work to protect your information and to respond quickly to any issue.
7. Your rights
Depending on where you live - including under India's Digital Personal Data Protection Act, 2023 and, for users in the EU or UK, the GDPR - you may have the right to access, correct or delete your personal data, to withdraw consent, and to complain to a data protection authority. To exercise these rights, email support@nxtutors.com from, or quoting, your registered WhatsApp number.
8. Changes and contact
We will update this policy when our practices change and show the new date above. For any privacy question or request, contact NXTutors Edtech Pvt Ltd at support@nxtutors.com or +91 78360 34313.
Frequently asked questions
What is TutorTwin?
TutorTwin is an AI study assistant that works inside WhatsApp. Students send a question as text, a photo, a PDF or a voice note and get a step-by-step explanation back in the same chat. It is available to students in every country where WhatsApp works, and it is made by the education company NXTutors Edtech Pvt Ltd.
Is TutorTwin a homework doubt solver?
Yes. TutorTwin is a homework doubt solver on WhatsApp: send any doubt as a photo, PDF, voice note or text, and it explains the solution step by step. Unlike a plain answer finder, it lets you ask follow-up questions about any step until the doubt is fully cleared.
What is a personal AI teacher?
A personal AI teacher is an AI tutor that works one-to-one with a single student - available whenever they need it, patient with repeated questions, and adapting explanations to their level. TutorTwin is a personal AI teacher that runs in your own WhatsApp chat and answers to a name you choose.
Do I need to download an app to use TutorTwin?
No. TutorTwin runs entirely inside WhatsApp. After you subscribe, your tutor sends you a message on WhatsApp and you reply to it. There is no separate app, no login and no password.
Which countries is TutorTwin available in?
TutorTwin is available worldwide - in every country where WhatsApp works. Prices are shown in your own currency for many countries, including the US, UK, eurozone, UAE, Saudi Arabia, Qatar, Canada, Australia, New Zealand, Singapore, Malaysia, Hong Kong, Switzerland, South Africa and India, and in US dollars everywhere else. International cards are accepted. Enter your WhatsApp number with your country code when you sign up.
Which subjects does TutorTwin help with?
TutorTwin is strongest in mathematics and the sciences - physics, chemistry and biology - where it works through problems one step at a time. It also helps with English, computer science, accountancy, economics and most school and early-university subjects.
Which curricula and exam boards does TutorTwin support?
TutorTwin works from the question you send, so it can help with questions from any curriculum. Students following IB, Cambridge IGCSE and A-Level, UK GCSE, US Common Core and AP, CBSE, ICSE and other national curricula all send their questions the same way, and TutorTwin follows the terms and conventions of the curriculum the question comes from. TutorTwin is not affiliated with any exam board.
Does TutorTwin just give the answer?
No. By default TutorTwin explains how to get the answer, step by step, so you can follow the method and use it again. If you prefer to try the problem yourself first, ask for a hint and it will give you one step at a time.
Can TutorTwin read handwriting?
Yes. TutorTwin reads printed text and handwriting from photos. A clear, well-lit photo of one question at a time gives the best results. If a photo is too blurry to read with confidence, it tells you rather than guessing.
Which languages does TutorTwin speak?
TutorTwin replies in the language you write in - English, Spanish, French, Arabic, Hindi, Hinglish and most other widely spoken languages - and keeps technical terms the way your textbook uses them.
Is the AI my teacher?
No. On every plan, what answers you is an AI study assistant. On a HumanAI Tutors plan it is set up in your chosen teacher's teaching style, but it is still an AI and never claims to be that person. The teacher is a separate, real person who reads the chats and replies when you ask for them or keep getting stuck.
Can my teacher see my chats?
Only when you chose a HumanAI Tutors plan, and only after you agree to it at signup. That teacher can then read the conversation from the day you chose them, so they know what you have been stuck on before they step in, and your phone number stays hidden from them. On an AI-only plan nobody else reads your chat.
Is TutorTwin a real teacher?
What answers you is always an AI, on every plan, and it never claims to be human or to be the person it is named after. On an AI-only plan that is the whole service. On a HumanAI Tutors plan there is also a real named teacher who reads your chats and replies in them - a separate person, clearly marked when they write. Like any AI, the assistant can make mistakes, so check important answers.
How accurate is TutorTwin?
TutorTwin is built to be careful: when an answer looks doubtful it runs a second check and tells you if something does not add up, rather than presenting a guess as fact. It can still make mistakes, so use it to learn the method and double-check anything that matters for marks.
How much does TutorTwin cost?
TutorTwin is sold as prepaid plans in three tiers - Solo, Pro and Elite - each for 1 month, 3 months or a year, with no per-question charges. Solo answers typed questions on one subject; Pro adds photos, PDFs, voice notes and mock tests; Elite covers all eight subjects. Longer plans cost less per month. Current prices, in your own currency, are on the pricing section of the home page.
How do I pay for TutorTwin?
Payments are processed securely by Razorpay. You can pay by international debit or credit card in your local currency from anywhere in the world; in India, UPI, net banking and wallets are also available. TutorTwin never sees your card details.
Does my subscription renew automatically?
No. Plans are prepaid and do not auto-debit. Before your plan ends, TutorTwin sends a reminder on WhatsApp. If you renew early, the new days are added to the end of your current plan, so you never lose days you have already paid for.
How quickly does TutorTwin start working after payment?
Usually within seconds. As soon as the payment is confirmed, your tutor sends a welcome message to the WhatsApp number you entered, and you can start asking questions straight away.
Can parents use TutorTwin for their children?
Yes. Many parents sign up on behalf of their child. You can enter a separate contact number for the parent, and the tutor runs on the student's WhatsApp number. We recommend parents stay involved and talk with their child about how they use it.
Is TutorTwin available 24/7?
Yes. TutorTwin is available every day, at any hour, in every time zone. Most students use it in the evenings and the night before tests, when teachers and tutors are not available.
Is there a limit on how many doubts I can ask?
There are no per-question charges. Every plan covers everyday studying - as many homework doubts, follow-ups and practice questions as a student normally needs. Fair-use limits exist only to protect the service from automated abuse.
Can TutorTwin help with SAT, AP, GCSE, A-Level, IB or other exam preparation?
Yes. Students use TutorTwin to work through practice problems, check their own solutions, revise chapters and take short quizzes for school exams and for standardised and entrance tests such as the SAT, ACT, AP, GCSE, A-Level, IB, JEE and NEET. It is a study assistant, not an official preparation course, and is not affiliated with any exam body.
Can I use TutorTwin on WhatsApp Web or on a laptop?
Yes. Because TutorTwin is a normal WhatsApp chat, it works wherever your WhatsApp account works - on your phone, on WhatsApp Web and on the WhatsApp desktop app.
Can two students share one subscription?
Each subscription is linked to one WhatsApp number, so your tutor keeps one continuous conversation with one student. For two children, subscribe each child's number separately so each gets their own personal AI teacher.
Is TutorTwin good for younger students?
Yes. TutorTwin adapts its language to the grade you tell it, and younger students often find voice notes the easiest way to ask. For younger children we recommend a parent sets it up and stays involved in how it is used.
What is the difference between TutorTwin and a general AI chatbot?
TutorTwin is built specifically for studying: it lives in WhatsApp, reads photos, PDFs and voice notes, explains step by step by default, offers hints and practice, double-checks doubtful answers, and uses school curriculum terminology. A general chatbot is a general-purpose tool that you have to steer yourself.
How do I contact TutorTwin support?
Email support@nxtutors.com from anywhere in the world, or call +91 78360 34313. NXTutors Edtech Pvt Ltd is headquartered at M3M Cosmopolitan, Sector 66, Gurugram, Haryana 122101, India.
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