Isochrony: Haptic Metronome

Feel every beat on iPhone and Apple Watch. Isochrony delivers precise haptics, 12 time signatures, tap tempo, BPM detection, favorites, and playlists.

Isochrony is a precision haptic metronome for musicians who want to feel the beat, not fight to hear it. Practice, rehearse, or perform with clear tactile tempo cues on iPhone and Apple Watch.

FEEL THE RHYTHM Audio clicks can disappear under an instrument, a rehearsal, or a live mix. Isochrony delivers crisp haptic pulses on every beat so you can stay in time without headphones or another sound competing for your attention.

APPLE WATCH METRONOME Use Isochrony directly from your wrist:

• Standalone haptic playback—no iPhone required
• 9 haptic profiles, from feather-light to heavy
• Digital Crown BPM control
• Tap tempo and on-device BPM detection
• 12 time signatures with accented downbeats
• Favorites and playlists for practice or performance
• Newton's Cradle and Metronome Ticker visualizers
• Two-way settings sync with iPhone

PRECISE TEMPO Isochrony's drift-compensating timing engine continuously compares expected and actual tick times, then corrects the next interval in real time.

TAP TEMPO & BPM DETECTION Tap along to set a tempo instantly, or let Apple Watch listen briefly and estimate the BPM of nearby audio. Microphone input is processed on-device and is never recorded or stored.

BUILT FOR MUSICIANS

• Adjustable range from 20 to 240 BPM
• 12 time signatures: 2/4, 3/4, 4/4, 5/4, 6/4, 7/4, 3/8, 5/8, 6/8, 7/8, 9/8, and 12/8
• Stronger haptic accents on downbeats
• Optional audio click and smooth visual beat cues
• Works completely offline
• No account, ads, analytics, or tracking

PRIVATE BY DESIGN Isochrony collects no data. Settings and saved favorites stay on your devices, while iPhone and Apple Watch communicate directly through Watch Connectivity.

Download Isochrony and keep precise time by feel.