SirenGPX: Speed Video Overlay

SirenGPX burns your workout data onto the video — speed, heart rate, altitude and more. All on your iPhone. HOW IT WORKS 1. Record a ride or run and save it to Apple Health — with an Apple Watch or any fitness app — or import a GPX file from any GPS tracker or bike computer. 2. Shoot a video on your iPhone or an action camera. 3. Pick the workout and the video in SirenGPX — it syncs them by time and renders the overlay. 13 FULL-SCREEN THEMES From minimal to neon: Cyber Rider, Pixel Racer, Grand Tour, VHS Tape, Night Strip, Superlight, Morning Coffee, Daylight, Vice, Fighter HUD, Aurelia, APEX and Meridian — pick a ready-made look for the mood of your ride, or build your own set of widgets. DATA WIDGETS - Bike computer: speed, distance, time - Heart rate, altitude and elevation profile - Speed graph - Route mini-map - Grade, cadence and power (Pro) Customize the colors and show only the widgets you need. PODIUM End your video with an animated ride summary — distance, moving time, average and top speed, climb and the route — in 13 designs to match the themes. Free for everyone. PRIVATE BY DEFAULT Everything renders on your iPhone. Your video and health data stay on the phone — no accounts, no cloud, no uploads. The one exception is optional and off by default: to show the start's place name on the Podium, the start point, rounded to about 100 m, is sent to Apple's geocoder. FREE, PRO IF YOU WANT IT Free: 6 speedometer styles, the core metrics (heart rate, altitude, distance, temperature, calories) and almost all themes — with a watermark on the video. SirenGPX Pro removes the watermark for good and unlocks the remaining speedometer styles, metrics and the Pixel Racer theme — a one-time purchase, no subscription. Great for cycling, running and other GPS workouts — from Apple Health or a GPX file. Works with any video in your iPhone Photos: the native camera, GoPro, DJI, Insta360 or another action camera (after exporting to Photos).