The short version
Momentum is a personal alarm app. Your alarm times, exercise choices, and streak data stay on your device. We don't sell data, run ads, or track you across other apps.
What we collect
Momentum collects the minimum needed to make the app work:
- Alarm data — times, days, exercise types, and sound selections you configure. Stored locally in your device's app storage using AsyncStorage.
- Streak data — a list of dates on which you completed a morning challenge. Stored locally on-device only.
- Camera frames — used in real time to count exercise reps. Frames are processed entirely on-device using a local ML model. No frames are transmitted, recorded, or stored anywhere.
- Apple ID (optional) — if you choose to Sign in with Apple, we receive an anonymized user identifier from Apple. We never receive your email unless you explicitly share it. This ID is used to associate your purchases with your account across devices.
- Purchase token (if Pro) — an anonymized transaction receipt managed by RevenueCat. We use this to verify your Momentum Pro entitlement. RevenueCat's privacy policy: revenuecat.com/privacy.
What we do NOT collect
- Analytics or usage telemetry
- Advertising identifiers (IDFA/GAID)
- Location data
- Contacts or calendar data
- Any data from other apps on your device
- Camera footage — frames are processed in-memory and immediately discarded
Permissions we request
- Notifications — required to deliver your scheduled alarms. Without this permission the alarm cannot fire.
- Camera — used when an alarm fires to count reps via computer vision. You are prompted the first time an alarm fires.
- Motion & Fitness (Walk challenge only) — used to count steps during a Walk challenge. Not requested for other challenge types.
None of these permissions enable ongoing background data collection.
Third-party services
Momentum uses the following third parties, each limited to the stated purpose:
- Apple Sign In — optional authentication. Apple's privacy policy governs the sign-in flow: apple.com/legal/privacy.
- RevenueCat — purchase validation and entitlement management. Only activated if you purchase Momentum Pro. RevenueCat does not receive camera data, alarm data, or streak data.
We do not use Google Analytics, Firebase, Amplitude, Mixpanel, Meta SDK, or any advertising SDK.
Data retention & deletion
All alarm and streak data lives locally on your device. Deleting the app removes all data immediately.
If you have signed in with Apple and purchased Momentum Pro:
- You can delete your account from Settings → Account → Delete account inside the app. This revokes your Apple Sign In token and clears all local data.
- RevenueCat retains an anonymized purchase record per their data retention policy. You may contact RevenueCat directly to request deletion.
Children
Momentum is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has submitted information to us, contact us and we will delete it.
Changes to this policy
We may update this policy when the app gains new features that affect data handling. Material changes will be noted in the App Store release notes and on this page with an updated effective date.
Contact
Questions or requests about your data: