NumNinja: Privacy Policy
Privacy Policy for NumNinja
Last updated: October 18, 2026
1. Who we are
NumNinja ("the app") is a mental math brain-training game for Android, developed by REVAMINE TECHNOLOGIES ("we", "us"). If you have any question about this policy, contact us at socialmail132@gmail.com.
2. Information we do NOT collect
NumNinja does not collect or transmit any of the following:
- Your name, email address, phone number or any account details (the app has no sign-in)
- Your location
- Your contacts, photos, files, camera or microphone data
- Device identifiers or the Advertising ID
- Analytics, usage tracking or crash-report data
3. Information stored on your device
To let you continue where you stopped, the app saves some information only on your device, in the app's private storage. We never receive this information.
| What is stored | Why |
|---|---|
| Level progress (stars and best score for each level) | To unlock levels and show your progress |
| Player stats (XP, level, day streak, games played, correct answers, best combo, date of last play, date the Daily Challenge was completed) | To show your Stats screen, streak and badges |
| Settings (difficulty, Relaxed mode, sound, vibration, animations, dark or light theme, whether you finished the tutorial) | To remember your choices |
This information does not identify you personally.
4. Permissions
- Vibration: used only to give a small vibration when you tap buttons or answer questions. You can switch it off in Settings.
The app does not ask for Internet permission and works fully offline.
5. Third-party services
This version of NumNinja contains no advertising networks, no analytics or crash-reporting tools, no social login and no in-app purchases.
When you tap Rate NumNinja, your phone opens Google Play. When you tap Share with friends, your phone opens the Android share menu. These actions are handled by those apps under their own policies. NumNinja does not receive any information from them.
6. Google Play
You download NumNinja from Google Play, which is run by Google and has its own Privacy Policy. Google Play Console gives us only aggregated and anonymous statistics, such as the number of installs and crash or "app not responding" rates from users who chose to share diagnostics with Google. We cannot identify individual users from these statistics.
7. Children
NumNinja is meant for a general audience and is not specifically directed at children under 13. The app does not collect personal information from any user, so it does not knowingly collect personal information from children either.
8. Data retention and deletion
Because all data stays on your device, you are in full control of it. You can delete everything at any time by uninstalling the app, or by going to Android Settings → Apps → NumNinja → Storage → Clear data. The app does not copy this data to any server or cloud backup.
9. Your rights
Privacy laws in some countries give you the right to access, correct or delete your personal data. Since we do not collect or hold any personal data about you, there is nothing for us to access, correct or delete. If you still have a question or request, please write to us at socialmail132@gmail.com.
10. Security
Your game data is kept in the app's private storage, which Android protects from other apps. No method of storing electronic data is 100% secure, so we cannot guarantee absolute security.
11. Changes to this policy
If a future version of NumNinja adds anything that changes how data is handled (for example advertising, analytics or purchases), we will update this policy and the Data safety section on Google Play before that version is released. The date at the top shows when this policy was last updated.
12. Contact us
Developer: REVAMINE TECHNOLOGIES
Email: socialmail132@gmail.xom