Comparison

メトロノーム Poly vs ZZZ Polyrhythm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

メトロノーム Poly

Features
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【2つのリズムを同時演奏】ポリリズムに対応したメトロノーム 上下2分割画面の「ツインメトロノーム」。 2つのメトロノームが完全に独立して動くので、複雑なポリリズムや変拍子の練習がこれ1台で完結します。 リズムの異なるピアノの右手と左手の練習にも使えます。 タップテンポに対応しました。 利用規約: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ZZZ Polyrhythm

Features
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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. 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. 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 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. 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)] - All ads removed - Add 3 or more overlay layers (unlimited) - Save / load / delete rhythm presets Subscription Details - Title: Premium (Ad-free) - Length: 1 month, auto-renewable - Price: 180 JPY / month Payment will be charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://smolt-stage.com/home/privacy/zzz-polyrhythm-privacy-policy-ios-en.html 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.

Screenshots

メトロノーム Poly3 screens
ZZZ Polyrhythm4 screens

Verdict

The call

The clearest difference is in-app purchases: メトロノーム Poly at none against ZZZ Polyrhythm's 1. メトロノーム Poly also leads on update cadence (every 6 days vs every 6 weeks) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ZZZ Polyrhythm sells 1 in-app purchase, starting at $0.99 per month. メトロノーム Poly asks for nothing beyond the download.

UpkeepUpdate frequency

メトロノーム Poly ships an update every 6 days, ZZZ Polyrhythm every 6 weeks. The most recent releases landed on October 5, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 3 level
メトロノーム Poly versus ZZZ Polyrhythm: the parameters behind the verdict, then further details
Parameterメトロノーム PolyZZZ Polyrhythm
PriceFreeFree
Update frequencyEvery 6 days — betterEvery 6 weeks
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB6 MB
Age rating4+4+
DeveloperNito KiyoshiSMOLT STAGE, K.K.

In-app purchases

None

メトロノーム Poly

No in-app purchases

1 purchases

ZZZ Polyrhythm

Subscriptions1
  • ZZZ Polyrhythm Premium$0.991 Month

Questions

Is メトロノーム Poly free?
メトロノーム Poly is free to download, with no in-app purchases.
Is ZZZ Polyrhythm free?
ZZZ Polyrhythm is free to download, with in-app purchases available.
Do メトロノーム Poly or ZZZ Polyrhythm have ads?
Both メトロノーム Poly and ZZZ Polyrhythm show ads.
Which is updated more often, メトロノーム Poly or ZZZ Polyrhythm?
メトロノーム Poly ships an update every 6 days, and ZZZ Polyrhythm every 6 weeks. Most recently, メトロノーム Poly was updated on October 5, 2026 and ZZZ Polyrhythm on September 29, 2026.

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