mind.game.sudoku · Android

Sudoku Mastermind

EnglishРусскийDeutschEspañolFrançaisItalianoPortuguês日本語中文

Privacy Policy

Last updated: 5 October 2026

In short. Sudoku Mastermind is a free, ad-supported sudoku game. No registration is needed. Your games and settings stay on your device. For the leaderboard, only a random player ID, your nickname (a generated one such as “Fox 482”, or a name you type) and your points are stored. The app uses Google Firebase for the leaderboard, statistics and crash reports, and shows ads from Google AdMob or Yandex Ads depending on your region. We do not sell data and never ask for contacts, camera, microphone or location.

1. Who is responsible

Robert Tadevosyan · robtdyn@gmail.com · Google Play: mind.game.sudoku

2. What data is used and where it is stored

DataPurposeWhere
Games in progress, daily-challenge status, total points, hint and note counters, settings, ad-frequency countersRunning the gameOnly on your device
Random anonymous player ID (Firebase Authentication)Linking your leaderboard entry to your device without an accountGoogle Firebase
Leaderboard entry: player ID, your total points and your nickname — either generated (stored as three numbers) or a name you typed yourself (optional, 2–16 characters)Global leaderboard, visible to all playersGoogle Firebase Realtime Database
Reports: if you report another player’s typed name, your player ID and the time of the reportReviewing and removing offensive namesGoogle Firebase Realtime Database (read only by the developer)
Game history and statistics: date, difficulty and result of each gameStatistics screen, daily calendarOnly on your device
Usage statistics: screens, app events, ad events, app-instance ID, device model, OS version, approximate region from IPUnderstanding how the app is used and improving itGoogle Analytics for Firebase
Crash reports: stack trace, device model, OS and app version, installation IDFinding and fixing crashesFirebase Crashlytics
Advertising ID, IP address, device and app information, ad impressions and clicksShowing and measuring adsGoogle AdMob or Yandex Ads
Time zone, SIM / mobile network country and language of the deviceChoosing the ad network and the holiday theme (e.g. Halloween, New Year)Read on your device only, never sent by the app

The app does not ask for your name, e-mail, phone number, contacts, photos, precise location or payment details. There are no in-app purchases. Earlier versions looked up the country by IP address and stored the device model, Android version, country and time zone in the leaderboard; version 4.0 no longer does this and removes those fields from your entry the next time the app starts.

3. Who receives data

Only the ad network for your region is used. We do not sell personal data. Providers may process data outside your country under their own policies.

4. Ads in the game

Ads never interrupt a puzzle. A full-screen ad may appear only after a finished game (win or loss), at most once every three finished games, at least five minutes apart and at most six times a day. Rewarded videos play only when you choose them to get extra hints or note fills. A banner is shown at the bottom of the screens.

5. Permissions

6. Retention and deletion

Data on your device is deleted when you uninstall the app. To delete your leaderboard entry, write to robtdyn@gmail.com with your Player ID (Settings → About → Player ID; a tap copies it) and we will remove it within 30 days. Statistics and crash data are kept by Google for the periods set in Firebase (up to 14 months for analytics, 90 days for crash reports). Ad data is kept under the ad networks’ rules; you can reset your advertising ID in the device settings.

7. Children

The game is suitable for all ages but is not directed at children under 13 and does not knowingly collect their personal data.

8. Your rights, changes and contact

You may access, correct or delete your data and withdraw consent for personalised ads at any time (Settings → Privacy options, where available, or the ad settings of your device). If our practices change we will update this page and its date. Contact: Robert Tadevosyan, independent developer, robtdyn@gmail.com.