30-Day Fitness Challenger

Last updated: June 2026

Your data stays yours. 30-Day Fitness Challenger has no developer-run servers, no advertising, and no third-party analytics or tracking SDKs.

Where your data lives

Your challenges, daily progress, notes, and photos are stored on your device. If you turn on iCloud Sync, that data syncs through your own private Apple iCloud account so it's available on your other devices. We never see it.

Group challenges (sharing)

Group sync is optional and off by default. If you choose to invite people to a challenge, the shared challenge — including participants' names, progress, and chat — is shared with the people you invite through Apple's iCloud (CloudKit) sharing. Only people you invite can see it, and the developer cannot access it. You can stop sharing at any time.

Apple Health

With your explicit permission, the app reads and writes workout and fitness data (such as workouts, active energy, steps, distance, and body metrics) to Apple Health to track and corroborate your progress. This data is processed on your device and stays in your Apple Health. You can revoke access any time in iOS Settings → Privacy & Security → Health.

AI features

Coaching insights, challenge generation, and image creation run entirely on your device using Apple Intelligence (Apple's on-device Foundation Models and Image Playground). Your data is never sent to any AI server.

Sign in with Apple

If you sign in with Apple, authentication is handled by Apple. We only use the name and email you choose to share to label your profile within the app; you can also use the app without an account.

Tracking & third parties

The app does not track you across apps or websites, does not use the device advertising identifier, and contains no third-party advertising or analytics SDKs.

Children

The app is a general fitness companion and is not directed at children. It collects no personal information for advertising from anyone.

Your control

You can disable iCloud Sync, turn off Group Sync, revoke Health access, or delete your data from within the app and iOS Settings at any time. Deleting the app removes its on-device data.

Contact

Questions? Contact me@njf.io or visit njf.io.