Last updated: 2026-09-29

Sudoku (by Hung Yi Kuo / JK Studio) does not collect, store or share any personal information.

• No accounts. You never sign in.
• No ads and no tracking. The app contains no advertising or analytics SDKs.
• Game data stays on your device. Your saved games, statistics, points and theme choice are stored locally on your iPhone and are deleted when you delete the app.
• Purchases. In-app purchases are processed entirely by Apple. We receive no payment or personal details; the app only checks with the App Store whether Pro has been purchased.
• Notifications. Daily Challenge reminders are optional, set up only if you turn them on in Settings, and are scheduled entirely on your device.
• Game Center. If you choose to use Game Center leaderboards and achievements, your play data is shared with Apple's Game Center service under Apple's own privacy terms, not with us.

If you have questions, contact: [email protected]