Privacy policy
Who we are
Sudoku Clan is a Sudoku game you play in your browser and in our Android and iOS apps. Questions about privacy: [email protected].
What you give us
If you play online, you choose a display name and an avatar. Other players in your matches see them. You can play as a guest with no email, phone number or account. If you sign in with Google or with Apple to save your progress, we receive your account name, email address and (from Google) profile picture; they are only shown to you, never to other players. With Sign in with Apple you can hide your email address.
What the game stores
For online play we keep a random player ID, your display name, avatar, rating and win/loss record per mode on our game server. On your device we keep your solo progress (puzzles, stars, trophies, unlocks, settings). If you sign in, a copy of that progress is saved to your account in Google Firebase (Cloud Firestore), so you can carry on from another device, and your account is linked to your player ID.
Analytics
Usage stats are off until you allow them: the game asks once, and "No thanks" keeps them off. If you allow it, we use Google Analytics for Firebase (how many people play, which modes, where players get stuck, crashes). Separately, Microsoft Clarity records anonymous session replays and tap heatmaps so we can see where the game is confusing; typed text and room codes are masked, and it runs without cookies and without your player ID unless you have allowed usage stats. These recordings are on for every player and cannot be switched off in the game. You can turn usage stats off at any time in Settings → Privacy.
Advertising
If we show ads in future, this page will be updated first and you will be asked for any consent the law requires.
What we never do
We do not sell your data. We never ask for your contacts, location, camera or microphone.
Deleting your data
Signed in: open the Me tab in the game and tap Delete account. That erases your online profile, rating, match record and cloud save straight away. As a guest: clear the app's storage to remove everything on your device, and email [email protected] with your display name if you want your online profile removed too.
Children
Sudoku Clan is suitable for all ages and does not knowingly collect personal information from children.
Changes
We will update this page if anything changes. Last updated 2026-11-10.