SirenGPX

Overlay real speed, heart rate and altitude from your Apple Watch workout onto your ride videos. Rendered on-device. One-time Pro purchase, no subscriptions.

Turn your ride videos into pro-looking clips. SirenGPX overlays your real workout data — speed, heart rate, altitude, distance — right on the footage, all on your iPhone.

HOW IT WORKS

1. Record a workout with your Apple Watch
2. Shoot a video during the ride
3. Pick the video in SirenGPX — the matching workout is found automatically by time
4. Choose a speedometer style and metrics, then export

FEATURES • 8 speedometer styles, from minimal to neon • Heart rate, altitude, distance, grade, cadence, power • Scenes: bike computer, elevation profile, speed graph, route map • Everything is rendered on-device — your video never leaves the phone • Works with any bike, board, skis or run

SIRENGPX PRO (one-time purchase, no subscription) • No watermark • All speedometer styles and premium scenes