Now live · Class 6 to college

A personal teacher for

Ask anything, any time, in your language, at your level, and get taught until it actually clicks. Not an answer machine. A teacher.

AS PM RK +
Students and teachers, across 8 languages
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8
Languages it teaches in
6–12
Classes, plus college
5 min
A day keeps the streak
₹0
On Tcher Lite
What it does

Everything you need to study. In one app.

Ask doubts, learn daily, practice, track progress, and actually understand what you are studying.

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Live demo

Do not read about it. Use it.

The real app, running right here. Tap through from splash. The cards follow what you see.

Demo uses live APIs with fair-use limits. Want the full app? Open Tcher →

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Why we built it

A class of sixty getsone explanation.

One speed, one voice, one example. A missed idea in Class 8 becomes a failed paper in Class 10. Tcher closes the gap the day it appears.

It lands for these seven The other fifty-three nod and move on
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So Tcher

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How it works

Ananya, Class 9. Stuck on buoyancy.

Copied the definitions. Understood neither. One Tuesday night, start to finish.

Tue · 9:40 pm Ch. 10 · Gravitation Test · Friday
01

She tells Tcher who she is, once

Setup · 30 seconds

Class 9, CBSE, Kannada and English. That is the whole setup, and it never has to be repeated.

Class 9 CBSE Kannada, English
02

She asks in her own words

Tuesday · 9:40 pm

No keywords, no prompt tricks. She types the doubt exactly as it sits in her head, or photographs the page.

An iron nail sinks, but a whole iron ship floats. Ma’am said buoyancy and Archimedes’ principle. I have copied it down and I still do not get it.
Matched · Ch. 10 Gravitation Thrust & buoyancy Relative density
03

Tobi does not answer. Tobi teaches.

Same minute

Something from her own kitchen first. Then the textbook words. Then a question back, to check it landed.

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Get the aluminium foil from your kitchen. Crush a piece into a tight ball, drop it in a mug of water. It sinks. Now flatten that same piece into a little boat and set it on the water. It floats. Same foil, same weight. The only thing that changed is how much water it shoves out of the way.

The water you shove aside pushes back up. That upward push is buoyant force, and Archimedes’ principle says it equals the weight of the water displaced.

So tell me: a ship’s hull is mostly hollow, full of air. What does that do to the amount of water it shoves aside?
04

She pushes back. Good.

9:43 pm
But the ship weighs thousands of tonnes and the nail weighs five grams. How can the heavier thing be the one that floats?
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Weight on its own never decides. It is a tug of war. The ship is huge and hollow, so before it has sunk even a few metres it has already shoved aside thousands of tonnes of water, and all of that water pushes back up. The tug of war goes even, and the ship stops sinking. The nail is tiny and solid. Fully underwater it shoves aside about a spoon of water. A spoon of water cannot hold up iron.

Displaced water weighs as much as you do → you float. Less than you → you sink.

05

Then the part that is actually in the exam

9:46 pm
Okay. But then where does relative density come in? That is the numerical they always ask.
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Same idea, written as one number. Relative density is your density divided by water’s. Solid iron comes to 7.8, far heavier than water, so the nail sinks. A ship is steel plus an enormous amount of trapped air, and the whole thing averages out around 0.3. Under 1 floats, over 1 sinks.

Your steel tiffin box is the same story. Lid shut, it bobs in a bucket. Open the lid, water rushes in, the air leaves, the average crosses 1, and down it goes.

R.D. below 1 floats · R.D. above 1 sinks · water is exactly 1

Say it shorter As a story Read it aloud in Kannada Quiz me on this
Safety

Every parent asks this first. So we built it first.

Tobi is a teacher, not an open chatbot. It lives inside your child’s syllabus, and every single message, hers and Tobi’s, is checked before it appears on screen.

Safety layer · always on Age 10–18 · No ads · No data sold

Three walls, not one filter

01
Scoped by design

Tobi is built around one syllabus for one class, and that is where most learning stays. When a student asks about general knowledge too, Tobi can answer, but every reply still passes strict content moderation first.

02
Checked both ways, every message

What she sends and what Tobi sends back both pass a safety check first. Nothing unsafe reaches her screen, even by accident.

03
Nothing hidden from you

Every conversation stays readable in the parent view, and anything flagged reaches you the same day, with what was said and what Tobi did about it.

Never generated, never shown
×Hate & slurs ×Violence & gore ×Sexual content ×Self-harm ×Crime & weapons ×Drugs & alcohol ×Caste & communal ×Personal details
What it looks like when it happens
Blocked · violence 9:58 pm
Message withheld. We do not repeat it back on screen.
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That is not something I can help with. If something is weighing on you, please talk to someone at home or a teacher you trust. I can help you find the words for it.

Sent to the parent view

Category, time, and exactly what Tobi replied. No guessing, no digging.

No advertising. No selling of your child’s data, to anyone, ever.
Who it is for

Two people. One app that works for both.

Students need to understand. Teachers need to help more students understand. Tcher is built for both, without asking either one to adjust.

Students

“I read it three times. Still don't get it.”

That is not your fault. The explanation in class was built for 40 students. Not for you, your pace, or the way you think.

Tobi gives you a different explanation. One that fits your class, your board, your language. And if that one does not click either, Tobi tries again. No sighing. No “I just explained this.”

You can ask at 11pm. You can ask the same question five times. You can ask in Hindi, Kannada, or plain Hinglish. Tobi stays until you get it.

Start learning free No card. No trial clock.
11:40 pm
Doubt, answered
Ask again
As many times as you need
8
Languages, in the one you think in
Teachers

“I know what to teach. Not always how to reach everyone.”

You know your subject. You know your syllabus. What you cannot always know is which student stopped understanding and did not say anything, and which explanation will bring them back.

Tcher shows you where students are getting stuck, before they fall too far behind. It gives you quiz and question paper tools that take minutes, not hours. And when a student needs another explanation at 10pm, Tobi handles it, so you do not have to.

You teach. Tcher fills the gap between class and understanding.

See teacher tools Free Lite Model
2 min
To generate a question paper for your class
Real time
See which topics your students are struggling with
24 hours
Tobi available to your students when you are not
Spark, in the app

Five minutes a day beats five hours in panic.

A daily card deck built from topics you pick. Answer the trivia, close your ring, keep the streak alive.

01
Trivia
Three questions, one streak
02
My Feed
News picked for your topics
03
Word Power
One word you will actually use
04
Myth vs Fact
One thing you believed wrong
05
Today's Hero
One person worth knowing
06
On This Day
One date that still matters
Six cards, five minutes
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From learners

"Ab samajh aaya."

That is the moment we built Tcher for. Here is what students and teachers told us.

★★★★★

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Plans

Start at zero. Grow when you need to.

Individual

Tcher Lite

Free

For everyday learning and understanding.

  • ✓Ask questions
  • ✓Learn at your level
  • ✓Spark daily learning
  • ✓8 languages
  • ✓Listen to explanations
  • ✓Ask follow-up questions
  • ✓Take quizzes
  • ✓Create notes
  • ✓Practise with assignments
Start free
Individual

Tcher Pro

₹** revealing soon

For serious prep. Everything in Lite, plus deeper tools for exams.

  • ✓Everything in Tcher Lite
  • ✓Previous years' question papers
  • ✓Full mock examinations
  • ✓Answer keys for question papers
  • ✓Pro tips for quizzes and assignments
  • ✓Mock interviews, Engineering and MBA
  • ✓Priority access to faster AI models
  • ✓JEE and NEET tracks
  • ✓Surprise challenges to keep you sharp
Go Pro
Institutions

Tcher Pro Plus

Custom

Bring Tcher to your students, teachers and academic teams.

  • ✓Everything in Pro, for every student
  • ✓Institution, admin and teacher logins
  • ✓Class, subject and student mapping
  • ✓Syllabus mapping with completion tracking
  • ✓Teacher mode and student mode
  • ✓Teachers create and assign assessments
  • ✓Performance tracked by teacher and admin
  • ✓Mock interviews for Engineering and MBA
Feature Lite Pro Pro Plus
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Questions

The things people ask us first.

Still unsure? Write to us and a person, not a bot, will reply.

Talk to us →

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Try now

Ask your first question in thirty seconds.

No card, no setup call, no waiting list. Pick your grade and start.