Privacy Policy — Adaptive Chess
Last updated: 25 July 2026

Adaptive Chess ("the app", package com.ahmadessam.adaptivechess) is developed by Ahmad Essam. This policy explains what data the app handles.

Playing offline against the computer requires no account and sends nothing off your device. Data is only collected if you choose to sign in and use online multiplayer.

Data we collect
If you play offline only
None. No account is required, and no gameplay data leaves your device. There is no analytics, advertising, or tracking SDK in the app.

If you create an account or sign in with Google
Data	Why	Where it goes
Google account ID, name and email address	To identify you when you sign in with Google	Stored on your device only
Username	Shown to opponents and on the leaderboard	Sent to our game server
Chess rating and game results	Matchmaking and leaderboard ranking	Stored on our game server
Moves played in an online game	Relayed to your opponent so the game can be played	Passed through our game server, not retained after the game
IP address	Inherent to making a network connection; used for abuse prevention	Processed by our server and hosting provider
Your email address is not sent to our game server and is not shared with other players. Other players only ever see your username, rating and chosen piece skin.

Data stored on your device
The app saves gameplay data locally using standard on-device storage: your player rating, game settings, selected board/skin, which optional items you own, and (if you signed in) your account details. This is removed when you uninstall the app.

Who we share data with
We do not sell your data or share it with advertisers. Data is processed only by the services needed to run the app:

Google Play — processes purchases and, if you use it, Google Sign-In. See Google's Privacy Policy.
Fly.io — hosts our online game server. See Fly.io's Privacy Policy.
How long we keep it
Your username and rating are kept on the game server while your account is active, so your ranking persists between sessions. Game moves are relayed in real time and are not stored after a game ends. Server connection logs are retained for a short period for abuse prevention.

Deleting your account and data
You can sign out and delete your local account at any time from Settings → Account in the app. To have your username and rating permanently erased from our game server, email ahmadessam1997@gmail.com from the address associated with your account and we will delete them within 30 days. Uninstalling the app removes all locally stored data.

Purchases
Optional in-app purchases (the Neural Coach subscription and cosmetic skins) are processed by Google Play. We do not receive or store your payment details; those are handled entirely by Google.

Children
The app is rated for everyone. We do not knowingly collect personal data from children under 13. Online play and sign-in are optional; if you believe a child has created an account, contact us and we will delete it.

Changes
If a future version changes what data is collected, this policy and the app's Play Store data-safety section will be updated before that version is released.

Contact
Questions about this policy: ahmadessam1997@gmail.com.