# メトロノーム Poly vs ProMetronome+

The clearest difference is update cadence: メトロノーム Poly at every 5 days against ProMetronome+'s every 3 weeks. メトロノーム Poly also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

メトロノーム Poly ships an update every 5 days, ProMetronome+ every 3 weeks. The most recent releases landed on September 18, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | メトロノーム Poly | ProMetronome+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 6 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nito Kiyoshi](https://appshunter.io/developer/1861743869) | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) |

## 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


### ProMetronome+

[App page](https://appshunter.io/ios/app/prometronome-plus/id6760995740)

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

**In-app purchases:** none


## 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 ProMetronome+ free?

ProMetronome+ is free to download, with no in-app purchases.

### Do メトロノーム Poly or ProMetronome+ have ads?

Both メトロノーム Poly and ProMetronome+ show ads.

### Which is updated more often, メトロノーム Poly or ProMetronome+?

メトロノーム Poly ships an update every 5 days, and ProMetronome+ every 3 weeks. Most recently, メトロノーム Poly was updated on September 18, 2026 and ProMetronome+ on September 21, 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.*