Music that follows your heart rate, not a playlist.
PeakBeat reads heart rate and running cadence in real time and picks the next track to match: the zone you are in chooses the energy, your steps per minute lock the beat, and owned audio is time-stretched so the kick lands on your foot. Phone and a standalone Galaxy Watch, no server in the loop.
Your effort writes the setlist.
Music that follows your heart rate and your cadence instead of ignoring both. Tempo rises when the effort does, drops when you recover. Phone and watch.
effort zones
Recovery, base, tempo and max, from your own heart-rate reserve. Each zone owns a BPM band and an energy band, and the music lives inside it.
tempo lock
Owned tracks are time-stretched with pitch preserved so an 85 BPM song fits a 170 spm stride. Half-time and double-time both count.
servers in the loop
Sensors, engine and player all run on the watch or the phone. Nothing about your workout leaves the device.
What ships in the beta
The high-level map. Every item below is built or in build; the waitlist gets each one as it lands.
Personal heart-rate zoning
Karvonen by default, %HRmax or fixed bands if you prefer. Live pulse is EMA-smoothed with a dwell window so a noisy sensor never thrashes the playlist.
Cadence lock
On runs your steps per minute override the band: the target becomes cadence ±4 BPM, matched at ½×, 1× or 2× so the beat and the footfall agree.
Every pick shows its why
Each track is scored on BPM fit and energy fit, gated by zone, then weighted by what you have loved before. The reason card shows the math live.
An affinity model you can read
Completes, replays and skips teach it, and a skip during a hard interval weighs eight times more. Transparent arithmetic, on-device, never uploaded.
Workout DJ
One tap builds a warm-up, build, peak and cool-down block from your library, keeps PR songs for the peak and never repeats.
Smart playlists
170 BPM (harmonic), Never-Skip, PR Songs: generated from behaviour, not curated by hand.
Runs on the watch alone
Galaxy Watch plays synced or on-watch files with the same engine and tempo lock, reading the wrist sensor directly. Leave the phone at home.
Your music, honestly
Local files, uploads and Plex, Jellyfin or NAS libraries get the full treatment. Streaming services are driven as a smart remote, because their terms forbid touching the audio.
A look inside PeakBeat
Scroll sideways. These are the screens as they exist today.
PeakBeat, answered
Does it work with Spotify or Apple Music?
Which watches are supported?
How does it know a track's BPM?
Does it need the internet?
Can it extract music from YouTube?
Five more apps, one altitude
The research behind PeakBeat
Zone 2 training: the beginner's guide to the easy sessions that build everything
What zone 2 is, why it builds mitochondria and fat oxidation, how slow it really feels, and how much of it you need…
How to find your heart rate zones without a lab test
Two numbers from your watch, one formula, and five zones that actually fit your heart. The Karvonen method explained…
Best BPM for running: how to match your music to your cadence
Find your running cadence, pick the BPM that fits it at half or full time, and build a playlist that holds your stride…
Bring yourself
to the max.
The suite is opening slowly, one app at a time. Tell us which part of your day you want handled first and we will start you there.
- Access to every app you pick, for the length of the beta.
- Invites go out in order. The apps you tick decide which one you get first.
- One email when your slot opens. No newsletter, no drip.
You're on the list.
We got it. When your slot opens you'll get one email with the build for the app you asked for first.