Privacy Policy

Quiet Numbers · Developer and operator: Sudarev Daniil · Last updated: October 21, 2026

Quiet Numbers ("the app") can be used without an account, and then no personal data is collected. If you choose to sign in, we keep the minimum data described below, only to run those features. We never sell or share your data.

1. No account

The app works without sign-up. We do not ask for your name, email or phone number.

2. Optional account

You can sign in with Apple, Google or email — only if you want to. Then our server (Supabase, protected by access rules) stores: your email address and sign-in ID, the nickname you choose, a friend code, your game progress (statistics, records, streaks, achievements), daily puzzle and puzzle-code results, and your friends list. This is used to move progress to another phone, for the leaderboard (nickname and time are shown) and for playing with friends.

This data is not used for advertising or tracking and is not shared with third parties. You can delete the account and all this data in the app: "Account" → "Delete account". Deletion is immediate and permanent.

How to delete your Quiet Numbers account without the app: email [email protected] from the address you signed in with (or tell us your nickname and friend code), subject "Delete account". We delete the account, nickname, progress, results and friends list within 7 days and confirm by email. Nothing is kept.

3. Data on your device

Only your settings (theme, vibration, mistake rules), an unfinished game and your win and record stats are stored, and only on your phone. They are not sent to us. Deleting the app deletes this data.

4. No ads, analytics or tracking

Without an account the app works offline. It has no advertising, analytics, trackers, in-app purchases or third-party SDKs that collect data.

5. Permissions

The camera and photos are used only by the “Photo sudoku” feature and only when you open it yourself: the picture is processed on the phone (built-in Apple Vision or Google ML Kit text recognition), is never sent anywhere and is not stored — only the board digits remain after recognition. From your gallery the app receives only the picture you pick. The microphone, contacts and location are not used. Vibration is used only as tap feedback and can be turned off in settings.

6. Children

Without an account the app collects no data from anyone. Accounts are intended for users aged 13 and over.

7. Changes and contact

If this policy changes, the new version will be published on this page. Contact: [email protected].