This privacy policy applies to the SixtyFour app ("Application") for iOS, created by Mark Orel ("Developer"). The Application is free. It has no in-app purchases, subscriptions or ads, and is provided "AS IS".
The Developer does not collect any personal information. The Application has no analytics, advertising or tracking SDKs, and it does not send data to servers run by the Developer. Registration with the Developer is not required.
The Application stores the following only on your device, so it can show your goals and home screen widgets:
puzzle:read)Uninstalling the Application deletes this data. You can also sign out or change your username in Settings.
To show your stats, the Application requests your public profile, game and rating data directly from the chess site you choose, using your username. For Lichess puzzle tracking, it also requests your puzzle activity using your sign-in token. These requests go from your device straight to that site, which handles them under its own privacy policy:
SixtyFour is an independent app. It is not affiliated with, endorsed by or sponsored by Chess.com or Lichess. All trademarks belong to their respective owners.
If you turn on reminders, the Application schedules local notifications on your device. No notification data is sent to the Developer or any server.
The Application does not collect your location.
The Application does not knowingly collect personal information from anyone, including children under 13.
This policy may be updated from time to time. Changes will be posted on this page with a new effective date.
Effective date: 2026-10-19
If you have questions about this policy, email [email protected].