iOS · Apple Music
Interval Runner
A treadmill-first interval timer that soundtracks every effort zone from your own Apple Music playlist — faster songs for the hard efforts, slower ones for recovery.
Build the workout
Time-based segments and nested repeats, across five effort zones from recovery to sprint.
Match the music
Your playlist is ranked by tempo and mapped to each zone, so the right song plays for the right effort.
Run it
Spoken cues, a live playhead through the whole workout, and hard-cut transitions between tracks.
Your library, your speed
Songs play at their natural tempo — selection, never time-stretching.