Support

Contact

Email [email protected] for questions, bug reports, or App Store review follow-up. Include your iOS version and a short description of what you were doing.

STON does not use accounts. CLS Studio cannot look up your workouts, because that data stays on your iPhone or in your private Apple iCloud database when you enable iCloud Backup.

What STON is

STON is a local gym log for iPhone. You can start an empty workout, run an example routine, import a CSV you exported from STON or Strong, and review history on Analytics. It requires iOS 26.

Exercise instructions and stills are for general reference only. They are not medical advice. Safety information is in Settings and on each exercise.

Data and ads

Workout history stays on your device unless you export a file, enable STON's private iCloud synchronization, or use a device backup. Ads appear on Analytics only. Privacy details, including iCloud, AdMob, and consent, are in the Privacy Policy.