VIEN

Terms of Use

Version 2026-11-13 · Effective 13/11/2026

By creating an account or using Bibozi you agree to these terms and to the Privacy Policy. If you do not agree, do not use the app. These terms are the licence agreement for the app between you and Bibozi.

1. The service

Bibozi helps parents study Chinese with their child along the book the child uses: words, model audio, speaking practice, practice games and progress reports. Part of the content is written by AI. We may improve, change or stop a feature; if a change takes away something you paid for, we will tell you and you may cancel.

2. Accounts and who may use the app

  • An account is created and managed by an adult (a parent or guardian) who is old enough to make a binding contract in their country. Children use the app only with their parent's permission and under their parent's supervision.
  • You are responsible for keeping safe the email or account you sign in with and the parent PIN, and for what happens under your account.
  • A guest account has no email and a small number of free page scans; create an account to keep your progress. A guest account is deleted when you sign out, or after 90 days without use.
  • Give true information and do not share your account outside your family.

3. Licence to use the app

We give you a personal, non-exclusive, non-transferable, revocable licence to use the app on devices you own or control, for your family's own study, as the app and these terms allow. You may not copy, sell, rent, reverse engineer or take the app apart, or use it to build a competing service, except where the law allows it.

4. Books and copyright

  • Bibozi is an independent app, not affiliated with or endorsed by the publishers of the books it works with. Book titles are used only to say which book a lesson follows.
  • Photograph only books your family owns, for your own child's study.
  • Lessons built from your photos are private to your family; do not share or republish them.
  • Some sample lessons are written by the app (words, example sentences, exercises) and contain no page, text or audio of the books.
  • Rights holders can ask for content to be removed at support@bibozi.com; we act on a clear request promptly.

5. AI-made content

Meanings, example sentences, exercises, stories and pronunciation scores are made by AI and may be wrong or not suit every child. Use them to support learning, not instead of the teacher. You can correct or report each word in the app, and we remove content that is not suitable for children. The model audio is a synthetic (computer) voice. A pronunciation score is an estimate, not a grade.

6. Plans and payment

  • Bibozi Free: the basic features, with limits (for example 3 pages a week).
  • Bibozi Plus (one child) and Bibozi Family (up to three children): paid monthly or yearly. Bibozi Prime (Family plus an AI chat with Mosco) is not on sale yet and cannot be bought today.
  • Payment is made through the Apple App Store or Google Play, with the price shown in the app before you buy. The plan renews automatically at the end of each period for the same price and period, unless you cancel at least 24 hours before the period ends. The store charges your account at purchase and again at each renewal.
  • Cancel or change the plan in your App Store or Google Play subscription settings. Deleting the app or the account does not cancel it. After cancelling you keep the plan until the end of the paid period.
  • A free trial (when offered) applies only when the store confirms you are eligible; the app shows how long it lasts. At its end the plan becomes paid unless you cancel at least 24 hours before it ends. A trial may be used once.
  • Refunds are handled by Apple or Google under their policies; we cannot refund a store payment ourselves.
  • Prices may change; a change applies only from the next renewal, and the store tells you beforehand and asks for your agreement where it must.
  • Restore purchases is in the paywall, for a new device or after reinstalling.

7. Fair use

Do not use the app to harm others, break the law, damage or overload the service, bypass its limits or scrape it automatically. To protect the service and keep costs fair there are reasonable daily limits on page scans, speaking scores and games.

8. Ownership

The app, its design, the Mosco character, drawings, sounds and the content the app makes belong to Bibozi or its licensors. Your data and photos remain yours; you allow us to process them only to provide the service, as the Privacy Policy says.

9. Ending

You can stop using the app and delete your account at any time in the app (Settings → Delete account) or by email. We may suspend or close an account that breaks these terms, after warning you where we can. When an account ends, your licence ends and your data is deleted as the Privacy Policy says.

10. No warranty and liability

The app is provided "as is" and "as available". We do not promise that it will always work without interruption or error, or that a child will reach a particular result in school or in an exam. To the extent the law allows, we are not liable for indirect or consequential damage arising from its use, and our total liability is limited to what you paid us in the 12 months before the claim. Nothing in these terms limits rights you have by law as a consumer, or liability that the law does not allow to be limited.

11. Apple and Google

  • If you got the app from the Apple App Store, these terms are between you and Bibozi, not Apple. Bibozi, not Apple, is responsible for the app and its content, for support and maintenance, and for any claim about the app (including product liability, legal compliance, consumer protection and intellectual property claims). If the app fails to meet a warranty, you may tell Apple, and Apple will refund the purchase price of the app; Apple has no other warranty duty for it.
  • Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them against you.
  • You confirm that you are not in a country under a United States embargo or listed as a restricted party, and that you follow the third-party terms that apply to you, such as those of your mobile network and of the App Store.
  • If you got the app from Google Play, Google Play's terms also apply to your purchases. The same limits apply for any claim about Google.

12. Changes to these terms

We may change these terms. We update the version at the top and ask you to accept the new text in the app. If you do not accept, you may stop using the app and delete your account; continuing after accepting means you agree.

13. Governing law

These terms are governed by the laws of Vietnam. Where the law of your country gives a consumer the right to bring a claim in their own courts or to rely on their own consumer rules, that right stays.

14. Contact

Bibozi · support@bibozi.com