Last updated: July 6, 2026
Bubble Sudoku is designed to be played, not to collect your data. This policy explains exactly what the app does — and, more importantly, what it doesn't do.
Nothing. Bubble Sudoku does not collect, transmit, sell, or share any personal information. The app contains no analytics, no advertising, no tracking technologies, and requires no account or sign-up.
Your game progress — puzzle saves, best scores, daily-challenge results, trophies, and settings — is stored only on your device, using your device's local app storage. This data never leaves your device through the app, and we have no way to access it. Deleting the app deletes this data.
Bubble Sudoku works fully offline. Puzzles are generated on your device. The only network activity occurs if you choose to tap an outbound link (such as this privacy policy or the contact email), which opens in your device's browser or mail app.
Bubble Sudoku is suitable for all ages. Because we collect no data from anyone, we collect no data from children.
Bubble Sudoku currently contains no advertising and no in-app purchases. If that changes in a future update, this policy will be updated first, and the change will be noted in the app's release notes.
If we ever change how the app handles data, we will update this page and the "Last updated" date above before the change takes effect.
Questions? Email us at hello@bubblesudoku.app.