Masteries Terms of Use

Last updated: October 24, 2026

These terms govern your use of the Masteries app. By using the app, you accept them.

1. Publisher

Masteries is published by Léo Bodoulé Sosso, sole trader (French micro-entreprise), SIRET 992 115 634 00014, 34 rue de Boves, 80090 Amiens, France, contact@masteries.app, +33 6 64 16 60 77. Publication director: Léo Bodoulé Sosso.

Data hosting: Supabase Pte. Ltd., 65 Chulia Street #38-02/03, OCBC Centre, Singapore 049513, servers located in Frankfurt (Germany).

2. The service

Masteries offers general knowledge paths by category, mastery tiers, exams, news questions and game modes.

• The app is free to download and use. In the free version, each lesson uses one heart; hearts come back over time.
• A paid subscription gives unlimited hearts (section 5).
• An account is optional. Without one, your progress stays on the phone and is lost if you uninstall.

3. Account

You sign in with your email address: a code is sent to you each time. You are responsible for access to your mailbox. You can delete your account at any time in the app (Profile → Edit my information → Delete account).

If you are under 15, ask a parent before creating an account or subscribing.

4. Coins and hearts

• Coins are earned by playing. They cannot be bought with money, have no monetary value, cannot be refunded and cannot be exchanged. They are used to get benefits in the app (next tier, hearts, game modes). A coin purchase is final.
• Without an account, coins and coin purchases are tied to the phone; with an account, they are backed up with it.
• The publisher may change the coin rewards, item prices and how hearts work.

5. Subscription

• Plans: monthly, quarterly or yearly. The price, including taxes, and the length of each plan are shown in the app before purchase. There is no free trial: the free version lets you try the whole path before paying.
• Payment: through your Apple or Google account, when you confirm the purchase.
• Automatic renewal: the subscription renews for the same length and at the same price unless you cancel it at least 24 hours before the end of the current period.
• Cancellation: in your Apple account settings (Settings → [your name] → Subscriptions) or Google account (Google Play → Payments & subscriptions → Subscriptions). Deleting the app or your Masteries account does not cancel the subscription. After cancellation, the subscription stays active until the end of the paid period.
• Refunds and right of withdrawal: purchases are processed by Apple or Google, whose terms apply, including for refund requests and the right of withdrawal.
• Restoring: a subscription bought with your Apple or Google account can be found on another device with "Restore purchases".
• Price changes: Apple or Google notify you under their rules; if you do not accept the new price, you can cancel.

6. Content

Questions are written from published sources and checked against an editorial charter. Mistakes remain possible: you can report a question from its correction screen, and we fix it if needed. News questions are prepared with the help of an artificial intelligence tool, then reviewed and published by the publisher, who is responsible for them. The content is meant for learning and entertainment; it does not replace professional advice.

7. Intellectual property

The questions, texts, illustrations, and the Masteries name and logo belong to the publisher or to their authors. You receive a personal, non-exclusive, non-transferable right to use the app. You may not copy, extract or reuse the content, in whole or in part, without written permission.

8. Fair use

You agree not to misuse the app: getting around its limits or purchases, extracting its content by automated means, disrupting how it works, or sending abusive reports. In case of breach, the publisher may suspend or delete the account concerned.

9. Availability and liability

The publisher does its best to keep the app running without interruption but cannot guarantee it: maintenance, updates or a provider's outage may interrupt it. The publisher may change the content and features. Its liability is limited to direct damage caused by a breach of these terms.

10. Personal data

How your data is processed is described in the privacy policy, available in the app (Profile) and on its App Store and Google Play page.

11. Changes to these terms

The publisher may change these terms. The date at the top of the page shows the latest version; if the change is significant, you will be told in the app.

12. Governing law and disputes

These terms are governed by French law. In case of dispute, first write to contact@masteries.app to look for an amicable solution. Failing agreement, the competent courts are those provided by law.