# メトロノーム Poly vs ZZZ Polyrhythm

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.

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.

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.

## The numbers

| Metric | メトロノーム Poly | ZZZ Polyrhythm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 6 days** | Every 6 weeks |
| Size | 6 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nito Kiyoshi](https://appshunter.io/developer/1861743869) | [SMOLT STAGE, K.K.](https://appshunter.io/developer/1708601451) |

## What reviewers say

### メトロノーム Poly

[App page](https://appshunter.io/ios/app/poly-2/id6756605549)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ZZZ Polyrhythm

[App page](https://appshunter.io/ios/app/zzz-polyrhythm/id6773375285)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZZZ Polyrhythm Premium | $0.99 | per month |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*