Effective Date: May 16, 2026
No Personal Data Collection
Zen Sudoku does not collect, transmit, or store any personal user data on external servers. All your game data remains entirely on your device.
We do not require any account registration, login, or personal information to use the app. You can play Sudoku completely anonymously.
Local Data Storage
The following data is stored locally on your device:
- Game history and puzzles solved
- Daily streak data and completion records
- Theme preference (light, dark, or system)
- App settings and preferences
- Best times and statistics
This data never leaves your device and is not accessible to us or any third party. Deleting the app will remove all locally stored data.
Third-Party Services
Zen Sudoku does not use any third-party services that collect user data. Specifically:
- No analytics services (Google Analytics, Firebase, etc.)
- No advertising networks or ad SDKs
- No crash reporting services
- No social media integrations
- No payment processors (the app is free)
Children's Privacy
Zen Sudoku includes a "Kidz Mode" designed for children. We take children's privacy seriously:
- Kidz Mode does not collect any data
- No personal information is required to use Kidz Mode
- There are no advertisements or external links in Kidz Mode
- The app is safe for children of all ages
Parents can放心 allow their children to use Kidz Mode knowing their privacy is fully protected.
Camera Usage
The OCR Scanner feature uses your device's camera to scan Sudoku puzzles from paper or other screens. Camera access is only used for puzzle scanning and is not used for any other purpose. Images captured for scanning are processed locally and are not stored or transmitted.
Contact Us
If you have questions about this Privacy Policy or Zen Sudoku's data practices, please contact us:
Changes to This Policy
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated effective date. Continued use of the app after changes constitutes acceptance of the updated policy.