Effective date: October 7, 2026
SirenGPX overlays workout data (speed, heart rate, altitude and more) from Apple Watch onto your videos. This policy explains what data the app processes and how it is used.
The app does not create user accounts and does not transmit personal data to its own servers. Video, telemetry, and overlay rendering are all processed entirely on-device; the only data sent off-device is purchase records (section 4), anonymous crash diagnostics (section 5) and, if you turn on place names, one rounded location (section 6).
Stored locally on-device:
The app requests access to video files so you can select a video to process. Video files are never uploaded to any server. The rendered output is saved to your Photos library only when you tap Save.
On iPhone the app can read workouts from the Apple Health app (Apple HealthKit) only with your explicit permission. Data read: workouts, heart rate, speed, route (GPS), altitude, cadence and power — used solely to overlay them on the video you choose. Access is read-only — the app writes nothing to Apple Health. HealthKit data is processed on-device and is not transmitted to any server, except the single rounded start point described in section 6, is never used for advertising or marketing, and is not shared with third parties other than Apple, as described in section 6. You can revoke access in Settings → Health → Data Access.
Purchases are processed by RevenueCat, which may receive a device identifier and transaction data per its Privacy Policy. Payment details are handled solely by the Apple App Store.
The app uses Sentry to automatically collect crash reports and unhandled errors, so we can find and fix bugs. Data sent is limited to technical diagnostics needed to debug a crash: device model, OS version, app version, and the error stack trace. Performance tracing, screenshots, and on-screen view hierarchy capture are all disabled. This data is not linked to your Apple/Google account or used for advertising or marketing, and is not shared beyond Sentry's processing of the crash report itself — see Sentry's Privacy Policy. The app does not use any other analytics SDKs.
If you turn on “Place name” in the Podium panel, the app sends the start point of a workout, rounded to about 100 m, to Apple’s geocoding service (Core Location) to get the city and district shown on the summary card. Only this one point is sent, with no other workout data and no identifiers from us; Apple processes it under its Privacy Policy. With the setting off, the card shows coordinates and nothing is sent.
The app is not directed at children under 13 and does not knowingly collect data from them.
If this policy changes, the updated version will be posted here with a new date. Material changes will be notified in-app.
Privacy questions: adm.infot@gmail.com