How Chess-Stone handles your data
Effective date: August 10, 2026. This policy explains what the Chess-Stone app collects, why, and the choices you have about it — in plain language, matched exactly to what the app actually does.
1 What we collect
Chess-Stone collects only what's needed to run your account, your matches, and your rankings. There's no advertising SDK, no analytics tracker, and no data broker involved anywhere in the app.
| Category | What, specifically | When |
|---|---|---|
| Account | Email address and password (if you sign up with email), or the name Apple/Google shares with us (if you use Sign in with Apple/Google). If you play as a guest, we create an anonymous account with no email at all. | When you sign up or sign in |
| Profile | Display name, and a profile photo if you choose to upload one (or a built-in avatar preset for guests). | When you set up or edit your profile |
| Camera / photo library | Only accessed if you tap "Take Photo" or "Choose from Library" to set a profile picture. Nothing is read or uploaded unless you actively pick or take a photo. | When you change your profile photo |
| Gameplay | Match history, moves, ratings (Elo), and win/loss/draw records for Classic and RPS Chess. Games played locally against another player on the same device, or against the bot, stay on your device and are never uploaded. | While you play online |
| Social | Friend connections and friend requests between accounts. | When you add or respond to a friend |
| Push notifications | A device push token, so we can notify you when it's your move or a match is found. Only stored if you grant notification permission. | When you grant notification permission |
We don't collect your location, contacts, payment details, or any data unrelated to playing the game.
2 How we use it
- To create and secure your account, and let you sign back in on any device.
- To run live matches — syncing moves between you and your opponent in real time.
- To calculate Elo ratings and leaderboard standings.
- To show your friends' online status and route friend requests.
- To send you a push notification when it's your turn or a match you started has been joined — never for marketing.
- To display your chosen display name and photo to other players in matches, friend lists, and rankings.
4 How long we keep it
We keep your account and gameplay data for as long as your account exists, so your ratings and history stay intact between sessions. If you delete your account from the app, your profile, match history, friend connections, and push token are permanently removed.
5 Your choices
- Access or correct your data — your display name and photo are editable directly in the Profile tab at any time.
- Delete your account — available from Profile → Delete Account, which permanently removes your account and associated data.
- Revoke permissions — camera, photo library, and notification permissions can be turned off any time in your device's system settings; the app degrades gracefully without them.
- Play without an account — local pass-and-play against another person or the bot never requires signing in.
6 Children
Chess-Stone is a general-audience app and isn't directed at children under 13. We don't knowingly collect personal information from children under 13. If you believe a child has created an account, contact us using the details below and we'll remove it.
7 Security
Data is encrypted in transit (TLS/HTTPS) between the app and our backend. Passwords are never stored in plain text. Access to the database is restricted by row-level security policies, so your data is only ever readable by you and the specific game context it belongs to.
8 Changes to this policy
If this policy changes in a way that materially affects how your data is handled, we'll update the effective date above and, for significant changes, notify you in the app.
9 Contact
Questions about this policy or your data? Reach us at builds.jds@gmail.com.
Also see our Terms of Service.