Privacy Policy

Last updated: 11 November 2026

This policy explains what ai-teacher.in (“ai-teacher”, “we”, “us”), run by the ai-teacher team, collects, why, and the choices you have. We collect as little as we can to teach you well.

1. Using it without an account

You can study without signing up. Your progress, notes and settings are then kept only in your own browser (local storage) and never reach our servers — except the questions you send to the AI teacher (section 4).

2. What we collect when you have an account

• Account details: your email address, username, optional name, and your password — stored only as a salted, one-way hash (PBKDF2), never as the password itself.
• Study data: your goals, progress, scores, recall schedule, handwritten and typed notes, and conversations with the AI teacher — so they follow you to every device.
• Study circle (only if you use it): your friends, the ideas you share (visible only to your friends), quiz duels and scores, and your days studied this week (shown to your friends).
• Reports and messages: anything you report, and messages you send through the Contact page.
• Security records: sign-in attempts and sign-in codes (stored hashed) with the network address they came from, to stop people guessing passwords.

We do not ask for your phone number, address, photos or contacts, and we do not sell your personal data.

3. How we use it

• To run the service: sign you in, save and sync your work, schedule your revision, and show your progress.
• To keep it safe: limit abuse, investigate reports, and protect accounts.
• To improve it, using counts and totals rather than looking at individuals.
• To answer you when you contact us.

4. Service providers we rely on

• Hosting and database: our servers and database are run by cloud providers who store data on our behalf.
• AI teacher: when you ask the AI teacher something, your question and the lesson it is about are sent to Anthropic, which provides the AI model, to produce the answer under its commercial terms.
• Email: sign-in and password-reset codes are sent through an email delivery provider.
• News: headlines in the news channels are fetched by our server from Google News; opening a story takes you to the publisher’s website, whose own policy then applies.
• Advertising: see section 5.

5. Advertising and cookies

ai-teacher is free because of advertising. Students on an ad-free plan see no ads.

• Ads are provided by Google AdSense. Google and its partners may use cookies or similar technologies to show ads and to measure them. Learn how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites, and manage ad settings at myadcenter.google.com.
• Because many of our users are students, including under-18s, we ask Google to show only non-personalised ads — ads chosen from the page, not from a profile of you.
• Ads are never shown inside books, quizzes, tests or meditation.
• The app itself uses your browser’s local storage (not advertising cookies) to remember your progress, settings and sign-in.

6. Children and students under 18

Under India’s Digital Personal Data Protection Act, 2023, personal data of anyone under 18 needs the consent of a parent or lawful guardian. If you are under 18, please create an account only with your parent’s or guardian’s permission. We do not track children or target advertising at them. If you believe a child is using an account without consent, contact us and we will help.

7. How long we keep it

We keep your account data while your account exists. If you ask us to delete your account, we delete your profile, progress, notes, chats, study-circle content and duels. Security records are kept for a short period only. Copies in encrypted backups expire on their normal schedule.

8. Storage limit

Each student can save up to 1 GB of content (notes, handwriting, chats and progress). Settings shows how much you have used.

9. Your rights

You can ask us to give you a summary of your personal data, correct it, delete it, or withdraw your consent, and you can raise a grievance. Use the Contact page (choose “My data and privacy”). We reply within 30 days. If you are not satisfied, you may complain to the Data Protection Board of India.

10. Security

Connections are encrypted (HTTPS). Passwords are hashed, sign-in tokens are stored hashed on our side, and access to the database is restricted. No system is perfectly secure; if something goes wrong we will act quickly and tell affected users as the law requires.

11. Changes

If we change this policy we will update the date above, and tell you in the app for important changes.

12. Contact

Questions about privacy: the Contact page.