Everything runs on your phone, using music you already have.
Bematist reads your steps per minute from your phone’s motion sensors and picks tracks whose tempo, in beats per minute (BPM), fits the pace you’re actually running. It switches automatically as your pace changes.
Half- and double-tempo tracks count as a match too, so a 172 BPM track suits a pace of 86 steps per minute, and the other way round.
The step counter can’t always be trusted, for example on a treadmill or with the phone in a bag. You can set the BPM range yourself during a run instead: drag it round the dial, and pinch to make it wider or narrower.
Bematist needs to know the tempo of each track. If a music program has already stored it in the file’s tags as a BPM value, Bematist reads it from there. Otherwise it analyses the audio itself, on your phone.
Analysing a large library can take a long time, so keep the phone plugged in. It only has to happen once, because later scans skip anything unchanged. After that, matching works entirely offline, with no account, network or server.
A chart shows how your tracks spread across tempos, above the cadence ranges of your recent runs. It makes it easy to see where you run at a pace your music doesn’t cover.
Triage is for music you haven’t sorted through yet. Play it during a run and decide on the go what to keep and what to discard, using your earbud buttons or the screen. It plays tracks one after another rather than matching your pace.
Tracks you keep or like go into playlists you can use on later runs. If you’d rather clear out a folder, prune mode permanently deletes the tracks you skip. It’s off unless you turn it on, and the app warns you before you start.
Each run is logged with its cadence and track-matching detail. You can look through it afterwards in your session history and see how well the music fitted your pace.
Bematist is licensed under the GPLv3, and you can read the source code. It costs nothing and has no ads.
Bematist