Avanues Ortiz, developer of Mateo: Best Chess Move (package app.mateochess). Contact: manuelfonsi999@gmail.com.
2. Data we process
Camera images: in Real mode and Scan mode the camera (or a photo you pick from your gallery) is used to read the chessboard. Images are processed only on your phone (OpenCV and an on-device model) and are never uploaded or stored on any server. We do not keep photos or videos.
Games and preferences: saved games, your profile answers (name or nickname, level, goals), theme, language and piece calibration data are stored only on your device. We have no servers that receive them.
Purchase data: if you subscribe, Google Play processes the payment, and RevenueCat receives an anonymous app user ID, the purchase history (product, dates, status) and technical device data so it can verify and manage your subscription. Data is encrypted in transit. We never receive your payment details.
Mateo has no ads, no analytics and no tracking. We do not use the advertising ID, your location, microphone or contacts, and you do not need to create an account.
3. Device permissions
Camera: to see your board. Images stay on your device.
Internet: only for subscriptions (Google Play and RevenueCat) and the Play rating dialog. Move analysis runs offline on your phone.
Notifications: only to remind you 2 days before a free trial ends. You can turn them off in Android settings.
Google Play Billing: to buy and manage subscriptions.
4. Purpose and legal basis (GDPR)
Providing the features you ask for: performance of a contract (Art. 6(1)(b)).
Handling and verifying subscriptions: contract and legal obligations (Art. 6(1)(b) and (c)).
Fraud prevention for purchases: legitimate interest (Art. 6(1)(f)).
These providers may process data outside the European Economic Area under GDPR safeguards (such as Standard Contractual Clauses or the EU-US Data Privacy Framework). We do not sell your data or share it for advertising.
6. Retention
Local data stays until you delete it in the app, clear the app's storage or uninstall the app. If Android backup is on, the system may include app data in your encrypted Google backup; you can turn this off in your phone settings. Google and RevenueCat keep purchase records as long as needed to manage subscriptions and meet legal obligations.
7. How to delete your data
Data on your device: clear the app's storage in Android settings or uninstall the app. To delete the purchase records linked to the app's anonymous ID at RevenueCat, email manuelfonsi999@gmail.com with the subject "Delete my data" and the app name (Mateo); we will process the request within 30 days. Google Play purchase history is managed in your Google account.
8. Your rights
You can request access, correction, deletion, restriction, objection and portability by writing to manuelfonsi999@gmail.com. You may complain to the Spanish Data Protection Agency (www.aepd.es) or your local authority.
9. Children
Mateo is intended for users aged 18 and over. It does not knowingly collect personal data from children.
10. Terms of use
Mateo is a chess learning and analysis tool. Suggestions come from a chess engine and may not always be perfect.
Respect fair play: do not use Mateo during tournaments, rated games or games against opponents who have not agreed to it. Use it to study, practise and review your games.
Subscriptions (weekly, monthly or annual; the annual plan may include a free trial) are billed by Google Play and renew automatically until you cancel in Google Play › Payments & subscriptions. If you cancel during the free trial, you will not be charged. Prices are shown in the app before you buy. Refunds follow Google Play's policies.
The free version has daily and per-session limits shown in the app.
The app is provided "as is", to the extent allowed by law. Mandatory consumer rights are not affected.
11. Changes
If we change this policy or these terms, we will publish the new version here with its date.