SUS4 Metronome

SUS4 Metronome is a subdivision-aware click that gives you more control over how you hear the beat. Beyond a bare quarter-note pulse, you can split each beat into eighths, triplets, sixteenths, quintuplets, sextuplets or 32nds, or pick a groove such as swing eighths, tresillo or son clave, so the grid is explicit at the tempo you are working at.

The app runs on iPhone, iPad, Mac and Apple Watch, so whether you are at the kit, behind the piano, or on stage, the click stays with you. The Watch version taps your wrist on every beat, with a stronger pulse on accents, and can run silently so you feel the beat through haptics alone in a loud room or with in-ears that cover the click.

Choosing the right subdivision matters. Practising at a slow tempo with no subdivision makes the space between beats vague. SUS4 Metronome keeps that space defined, and when you want more there are polyrhythms, separate clicks for each ear, tempo maps that change speed through a piece, and a trainer that nudges the tempo up as you improve.