Support — Chompbook

We read every message. Write to support@chompbook.online — in any of the app's languages — and we will usually answer within two working days.

To report a wrong or inappropriate lesson, tap the flag on the lesson screen. To send technical details about a problem, open Settings → Error log → Send to the developer.

Subscriptions

How do I cancel Chompbook Pro?

Google Play: open Play Store → profile → Payments & subscriptions → Subscriptions → Chompbook → Cancel. iPhone: Settings → your name → Subscriptions → Chompbook. Or in the app: Settings → Chompbook Pro → Manage subscription. Pro stays active until the end of the paid period. Deleting the app does not cancel the subscription.

How do I get a refund?

The store processes payments, so request a refund there: in Google Play (Order history → Request a refund) or at reportaproblem.apple.com. If that doesn't work, write to us with your order number and we will help.

I changed phones. How do I get Pro back?

Chompbook AI says the daily limit is reached.

The fair-use allowance covers about 10 fifteen-minute AI lessons a day and resets at 00:00 UTC. Until then lessons continue without AI.

Lessons and AI

Do I need AI?

No. Lessons from your own materials and the five built-in courses work without AI and without internet. AI makes explanations and quizzes richer and checks open answers.

Which AI services can I connect?

A free service in a few taps (OpenRouter, Google Gemini, Mistral and others, depending on your age and region), your own key for Claude, ChatGPT, Groq, NVIDIA, Yandex Alice AI, Qwen or your own server, or Chompbook Pro.

A file won't import.

Try another format (PDF, EPUB, Word, TXT, Markdown, HTML) or paste the text. Very large scanned PDFs take time to recognise on the phone. If it still fails, send the error log from Settings.

Your data

How do I move my progress to a new phone?

Settings → Export backup on the old phone, then Settings → Restore from backup on the new one. We keep no copy, so a backup is the only way.

How do I delete my data?

See Delete your data.

Contact

E-mail: support@chompbook.online · Privacy: privacy@chompbook.online
Oleg Tsarkov, an individual entrepreneur registered in the Republic of Armenia (state registration no. 286.1553696, taxpayer no. 20064196, address: 12 V. Vagharshyan St., Arabkir, Yerevan 0012, Republic of Armenia)