No manual playlists. No average BPM. FLUX reacts to your effort in real time — here's how, in four steps.
Link Apple Music and go. Got an Apple Watch, a Garmin, a Polar or a chest strap? FLUX walks you through it device by device and runs on your live heart rate. No sensor at all? Your phone counts your cadence instead — same sync, zero gear.
Every track in your library gets a BPM and an Energy Score, then gets sorted into training zones. That's the foundation the whole engine runs on. It happens once, in the background — after that it's instant.
Your live heart rate sets the zone. FLUX picks the matching track from your library and crossfades into it — automatically, mid-run, without you touching the phone. Or build a structured workout and let the music follow the plan instead.
After every run: how synced your body was with the music, your winning track, zone breakdown, splits and route. One number that turns an abstract idea into something you want to beat.
Connecting a watch, pinning music to zones, building a workout, setting a drop point — every task, with the actual screens.