Who we are
Prowess (“we”, “us”) is a running gait-analysis app published by ShoeSense Inc. We can be reached at shoesenserunning@gmail.com.
What we collect
Account information
- Email address — used for sign-in and account recovery.
- Display name (optional) — used to personalize your dashboard.
Sensor data
When your Prowess sensor records a run, the app uploads:
- Per-step gait metrics — 16 numerical measurements per foot strike, including ground impact, contact time, cadence, stride length, vertical oscillation, pronation, and related biomechanical fields.
- Session metadata — timestamp, duration, step count, which foot was wearing the sensor, the training goal you selected.
- Sensor identifier — the Bluetooth ID of the paired sensor.
We do not collect GPS location, audio, video, or any identifier that links your gait data to a specific physical location.
Apple Health (HealthKit)
If you grant permission, Prowess uses Apple HealthKit to:
- Read your existing run history, so your Prowess trends sit alongside the rest of your activity.
- Write the runs Prowess records back to Apple Health, so they appear with everything else you track.
HealthKit access is optional, is controlled by you in iOS Settings → Privacy & Security → Health, and can be revoked at any time. Health data obtained through HealthKit is used only to provide these in-app features. We never use Health data for advertising or marketing, we never sell it, and we never share it with third parties for their own purposes — consistent with Apple’s HealthKit requirements.
App behavior
- Goal selection and exercise completion — saved so your progress persists across devices.
- Crash and error reports — when the app crashes we record a non-personal stack trace via Sentry and Firebase Crashlytics. Reports include your user ID but no email, no name, and no gait data.
- Device verification — we use Apple's DeviceCheck (iOS) and Google Play Integrity (Android) to confirm requests come from a real Prowess install. These services return an opaque token; we do not see your device's hardware ID.
We do not collect: precise location, contacts, photos, calendar, microphone, camera, or browsing history.
How we use your data
- To run the app: store your sessions, compute your trends, sync data across your devices.
- To improve the app: aggregate, anonymized usage statistics help us prioritize features.
- To diagnose crashes: stack traces help us fix bugs.
- To prevent abuse: device verification stops automated scraping of the API.
We do not sell your data, share it with advertisers, or use it for advertising profiling.
Where your data lives
Your data is stored in Google Cloud Firestore and Google Cloud Storage, in the United States, under our Firebase project shoesense-v2. Crash reports go to Sentry (United States). Both providers are bound by their own privacy commitments (Firebase; Sentry).
How long we keep it
- Account and gait data: until you delete your account.
- Crash reports: 90 days, then automatically removed.
- Server logs: 30 days.
Your rights
You can:
- Access your data — every session is visible in the app.
- Delete your account from the Profile → Delete account screen. This removes your sessions, gait data, account, and all coach links from our servers within 30 days. The deletion runs through our
deleteAccount Cloud Function and is irreversible.
- Export your data — email shoesenserunning@gmail.com and we will return a JSON archive of your sessions within 30 days.
- Object or restrict processing — email us and we will pause processing pending review.
If you are in the EU/EEA, the UK, or California you have additional rights under GDPR or CCPA. We honor those rights regardless of where you live.
Children
Prowess is not directed at children under 13 (or under 16 in the EU). We do not knowingly collect data from children. If you believe a child has signed up, email us and we will delete the account.
Sharing data with coaches
If you accept a coach invite, the coach you accepted gets read access to your sessions. You can revoke that access at any time from the Profile screen. Coaches cannot delete your data; only you can.
Changes to this policy
If we materially change this policy we will:
- Post the updated version at this URL.
- Show an in-app notice the next time you open Prowess.
- Require you to re-consent before continuing to use the app.
Contact
Questions, complaints, or data requests: shoesenserunning@gmail.com.