The short version
Freevia does not collect or receive personal data from Sudoku Buddy. The app has no account, ads, analytics or internet permission. Camera processing and puzzle history stay on your device. A photograph leaves the app only when you deliberately share it with another app.
What stays on your device
Sudoku Buddy stores the following information in app-specific storage on your phone:
| What | Where | Why |
|---|---|---|
| Photographs of puzzles you scan | The app's private files directory | So a puzzle can be reopened from the history |
| The digits read from each puzzle, and your corrections | The app's private files directory | So your progress survives closing the app |
| The last few photographs the app refused to read | The app's external files directory | So you can look at what went wrong, or send it to the developer |
| Your settings | The app's private preferences | So they persist |
Accepted puzzles and progress are stored in the app's private files. Refused photographs are stored in the app's external files area so Android can make a selected image available to the share sheet. Other apps do not receive access unless you start sharing.
You can delete accepted and refused scans from the app's history. When the app keeps more than six refused photographs, it automatically removes the oldest.
No network connection
Sudoku Buddy does not request Android's INTERNET permission and cannot send data to Freevia or any other server. It contains no advertising, analytics or crash-reporting service and does not access an advertising identifier.
Sharing is your choice
When you choose Share or Send diagnostics, Sudoku Buddy opens Android's share sheet. You select the receiving app and recipient. The selected app receives temporary read access only to the file or files you chose.
After another app receives a file, that app's privacy policy and data practices apply. Freevia receives a file only if you choose Freevia as its recipient and send it.
Camera processing
Camera frames are analyzed on the phone to find and read a Sudoku grid. Preview frames are not uploaded or recorded as video. The app stores a puzzle photograph when it accepts a scan and may retain an unsuccessful scan as a diagnostic image, as described above.
Deleting your data
Delete individual scans from the app's history. Uninstalling Sudoku Buddy removes its app-specific files and settings. Android backup is disabled for the app, so this information is not copied to Google's device-backup service.
Children
Sudoku Buddy is intended for a general audience aged 13 and over. Freevia does not collect personal data from users of any age through the app.
Changes to this policy
If the app's data practices change, Freevia will update this page and the date above. The policy's source and revision history are also available in the public GitHub repository.
Contact
Email info@freevia.org. You can also raise a public technical issue in the GitHub issue tracker.