Data in the app

Completions, streaks, personal bests, and unfinished moves are stored locally first with Apple's UserDefaults. If you are signed in to iCloud, Chainfold uses Apple's iCloud Key-Value Store to sync this gameplay content across your devices. The synced content is associated with the Apple Account used for iCloud, solely for app functionality, and is not used for tracking.

Chainfold requires no Chainfold account and contains no analytics SDK, advertising SDK, or developer-operated backend. The developer cannot view or download your iCloud save and does not receive your name, email address, Apple Account, or device identifier. Preferences remain only on the current device.

Sharing and friend challenges

Only when you choose the system share sheet does Chainfold hand a share image or challenge link to an app or service you select. That recipient processes the content under its own privacy policy. A challenge link contains the board, target, move limit, version, and integrity check. It contains no name, account, device identifier, or solution path.

Website

The Chainfold website adds no analytics, advertising, account, form, or non-essential cookie. Hosting and network providers may still process IP addresses, User-Agent values, and server logs for delivery, security, and troubleshooting under their policies and applicable law.

Children's privacy

Chainfold does not ask anyone, including children, to submit a name, contact information, or social profile. Its iCloud gameplay save contains only puzzle IDs, moves, completion state, personal bests, and modification times; it contains no free-form text.

Retention and deletion

The developer cannot access, retain, or delete your iCloud save on your behalf. Removing the app deletes local progress and preferences, but an iCloud copy may remain and be restored after reinstalling; that data is managed through your Apple Account and the iCloud controls Apple provides. Content you shared with a third party must be managed through that service.

Changes to this policy

If Chainfold's data practices materially change, this page will be updated with the new date and explanation before the new practice takes effect, and the App Store privacy information will be updated as well.

Contact

For questions about this policy, contact the privacy contact email, which will be added before release.