Privacy policy

Last updated 5 June 2026.

SudokuStreak is a daily Sudoku game. This policy explains what data the app handles and why. The short version: we collect only what is needed to run your account, your streak and the optional social features. There are no ads, no third-party trackers, and we never sell your data.

Playing without an account

You can play the daily puzzle, keep a streak, and use every solo feature without signing in. In that mode all of your data, meaning your play history, streak and settings, stays on your device and is never sent to us.

If you sign in

Signing in is optional and uses Sign in with Apple. We never see your Apple password. Apple gives the app a private account identifier, and we do not collect or store your email address or real name. When you have an account, we store the following in our database so your profile and the social features work.

• Profile. A display name and avatar emoji you choose, and an automatically generated friend code.
• Game results. For each puzzle you finish: the date, difficulty, completion time, result, mistake count, and whether hints were used. This powers the leaderboards and cross-device sync.
• Friends. The friend connections you create, and the challenges you send.

Inviting friends

The invite from contacts option uses Apple's system contact picker. The app does not get access to your contacts list. Apple returns only the single phone number you tap, and only to pre-fill an invite message that you choose to send. We do not store your contacts.

Where data is stored

Account data is stored using Supabase, our backend provider, on servers in the European Union. Access is protected by row level security, so you can only read and write your own data and data your friends have shared with you.

What we do not do

• No advertising.
• No third-party analytics or tracking SDKs.
• No selling or sharing of personal data with third parties.

Deleting your data

You can delete on-device data by removing the app. To delete your account and all associated server data, meaning your profile, results and friends, email us and we will remove it.

Children

SudokuStreak is rated for general audiences and is not directed at children under 13. We do not knowingly collect personal data from children.

Changes

If this policy changes, the last updated date above will change. Material changes will be reflected here before they take effect.

Contact

Questions about this policy can go to coraliadigital@icloud.com.