Privacy Policy

Effective September 4, 2026

momentum is built on a simple idea: your training data is yours. This policy explains what we collect, why, and the controls you have. The short version — your workouts live on your device first, everything social is opt-in and private by default, and we never sell personal data.

Data we collect

• Workout data — GPS routes, pace, distance, duration, and the exercises you log. Recorded on your device as it happens so a dropped phone or dead battery never loses a workout.
• Health data (optional) — heart rate, resting heart rate, HRV, sleep, and body mass, read from Apple Health only after you grant permission. Used solely to personalize your training zones, recovery guidance, and calorie estimates.
• Account data — email address and profile details you provide, used to sync your training across devices.

How we use it

• To build and adapt your training plan — computed by deterministic rules on your data.
• To show your own history, records, and personal heatmap. These are private by default.
• To generate coaching summaries. When AI features are enabled, workout summaries are processed server-side; your raw GPS routes are not required for this and health metrics are minimized.

What we never do

• We never sell your personal data, and we never share it with advertisers or data brokers.
• We never make your location, routes, or health data public without an explicit opt-in.
• We never use your health data for anything other than the features you can see.

Marketing-site measurement

If you choose Allow on momentumrunning.app, we use the OpenAI Ads Measurement Pixel to understand whether an ad leads to an App Store visit. The Pixel receives an App Store link clicked event, the page origin, and a privacy-preserving ad-click identifier stored in the first-party __oppref cookie. It does not receive your momentum account, email, health data, workout data, or precise location.

Measurement is off until you opt in. You can change your choice at any time through the Ad choices control on the site.

Apple Health

Health data is read only with your permission, is used only inside momentum, and is never transmitted to third parties or used for advertising, in accordance with Apple's HealthKit guidelines. You can revoke access at any time in the Health app; momentum keeps working without it.

Sharing and social

Every workout is visible to only you unless you change its visibility. If you choose to share, you control the audience, and route privacy zones let you hide where you start and finish.

Retention and deletion

You can export or permanently delete your data at any time from Profile → Settings → Data. Deletion removes your account and synced data from our servers within 30 days.

Contact

Questions or requests: privacy@momentumco.app.