Send an email to cakirmehm@gmail.com with the subject “Chessball account deletion”, including your in-game display name. Sending it from the Google or Apple email address your account is signed in with is how we verify the request is yours.
Deletion is completed within 30 days of a verified request, and we confirm by reply once it is done. Deleted data cannot be restored.
Guest progress never leaves your device — there is no server-side account to delete. Uninstalling the app removes it.
You can turn notifications off at any time in Settings, which also removes this device’s token; and you can sign out, after which the app collects nothing further.