Which cameras work?
Anything that records MP4 or MOV: every DJI Osmo Action, Insta360, GoPro, drones and phones. Drones and cameras with built-in GPS also save some data of their own, like position, speed and height, so they work without an extra file. For heart rate, power or cadence, or for cameras without GPS, add a GPX or FIT file from your watch or app.
How do I use my Strava activity?
On the Strava website, open the activity, choose the ⋯ menu and Export GPX. Open that file in Overlayer and pick your video.
When is it coming out?
Android is first and is in testing now; the iPhone version is in development. Leave your email above to hear the day each launches, or to join the Android beta.
Which phones does it run on?
Android 8.0 or newer. Exporting in 4K needs a phone that can record 4K itself; most phones from the last few years can.
Does it need an internet connection?
Never. Everything happens on your phone, so it works on a mountain with no signal.
Are the numbers accurate?
They're exactly what your devices recorded, lightly smoothed for video. GPS and sensors aren't perfect, so treat the overlay as a great-looking record, not an official timing or medical tool.