# ZZZ Polyrhythm vs Metronome&Jam

The clearest difference is ads: Metronome&Jam at none against ZZZ Polyrhythm's shown. Metronome&Jam also leads on update cadence (every 4 days vs every 6 weeks) and device support (4 vs 2). On price and in-app purchases there is nothing between them.

Both are free to download. ZZZ Polyrhythm sells 1 in-app purchase, starting at $0.99 per month and Metronome&Jam sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ZZZ Polyrhythm ships an update every 6 weeks, Metronome&Jam every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ZZZ Polyrhythm | Metronome&Jam |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 6 MB | 8 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SMOLT STAGE, K.K.](https://appshunter.io/developer/1708601451) | [Masahiro Wada](https://appshunter.io/developer/1850110639) |

## What reviewers say

### 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 |


### Metronome&Jam

[App page](https://appshunter.io/ios/app/metronome-and-jam/id6797265391)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


## Frequently asked questions

### Is ZZZ Polyrhythm free?

ZZZ Polyrhythm is free to download, with in-app purchases available.

### Is Metronome&Jam free?

Metronome&Jam is free to download, with in-app purchases available.

### Do ZZZ Polyrhythm or Metronome&Jam have ads?

ZZZ Polyrhythm shows ads; Metronome&Jam does not.

### Which is updated more often, ZZZ Polyrhythm or Metronome&Jam?

ZZZ Polyrhythm ships an update every 6 weeks, and Metronome&Jam every 4 days. Most recently, ZZZ Polyrhythm was updated on October 28, 2026 and Metronome&Jam on October 31, 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.*