ZZZ polyrhythm metronome

Zzz Polyrhythm is a polyrhythm-focused metronome that lets you layer multiple rhythms simultaneously for advanced
rhythmic practice. From classical 2-against-3 to jazz shuffle to contemporary 7-against-11 — instantly build any
rhythm pattern you can imagine and play it back with professional-quality voices.

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■ Key Features

[Base Beat — the time-keeper]
- Time signature: any numerator (1-16) and denominator (2 / 4 / 8 / 16)
- BPM: precise control from 30 to 240
- Tap Tempo: detect any tempo in real time
- 8 voices: Wood Block / Click / Cowbell / Sine / Square / Tick / Hi Click / Low Thud

[Layered Rhythms — Overlay]
Layer additional rhythms on top of the base beat to construct complex polyrhythms.
- Starting beat: not only "beat 1, beat 2" but also fractional positions like "beat 1.5"
- Length: whole / half / quarter / eighth / sixteenth / thirty-second note × none / dotted / double-dotted
- Subdivisions: any tuplet from 2 to 11
- Shuffle mode: play only the first and last clicks for a jazz swing feel
- Timing offset: slide the start/end positions back and forth to fine-tune swing
- Voice: choose an independent voice for each overlay from 8 sound presets

[Visualizer]
Concentric ring display lets you see rhythm timing at a glance. A dot lights up the moment each click fires, helping
you grasp polyrhythm structure visually.

[Presets] (Premium)
Save your favorite rhythm configurations with custom names. Recall with one tap. Browse multiple presets and switch
any time.

[Phase-preserving BPM changes]
Change BPM in the middle of a beat — the rhythm doesn't reset, it smoothly accelerates or decelerates, just like a
professional studio metronome.

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■ Who it's for

- Drummers / percussionists training complex rhythmic sense
- Jazz / fusion players developing swing feel
- Instrumentalists practicing 3-, 5-, 7-tuplet figures
- Composers / arrangers analyzing multi-voice rhythm relationships
- Performers studying traditional cross-rhythms and contemporary music
- Music school students and educators as a teaching tool

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■ Languages

日本語 / English / 中文 / 한국어 / Español / Português

Switch languages manually from the hamburger menu, or have the app follow your device's system language.

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■ Free vs Premium

[Free]
- Base beat + up to 2 overlay layers
- All 8 voices / any time signature / BPM 30-240
- Tap Tempo / Shuffle / full feature access
- Discreet banner ad + occasional interstitial

[Premium (Ad-free) — monthly subscription]
- All ads removed
- Add 3 or more overlay layers (unlimited)
- Save / load / delete rhythm presets
- Cancel anytime via Play Store subscription settings

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■ Developer

SMOLT STAGE, K.K.
© 2026 SMOLT STAGE, K.K.

For questions and feature requests, please use the in-app feedback form. We hope this contributes to your musical
practice.