# Rainbow Piece vs POYOJI

The clearest difference is iOS requirement: POYOJI at 15.6 against Rainbow Piece's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Rainbow Piece ships an update every 3 months, POYOJI every 2 months. Both last shipped on September 30, 2026.

## The numbers

| Metric | Rainbow Piece | POYOJI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 1 MB | 1 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Kiyoshi Izumi](https://appshunter.io/developer/1807085294) | [Chihiro Omi](https://appshunter.io/developer/1856114249) |

## What reviewers say

### Rainbow Piece

[App page](https://appshunter.io/ios/app/rainbow-piece/id6745691663)

**Features:** Apple Watch app

**In-app purchases:** none


### POYOJI

[App page](https://appshunter.io/ios/app/poyoji/id6755753653)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Rainbow Piece free?

Rainbow Piece is free to download, with no in-app purchases.

### Is POYOJI free?

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

### Do Rainbow Piece or POYOJI have ads?

Neither Rainbow Piece nor POYOJI shows ads.

### Which is updated more often, Rainbow Piece or POYOJI?

Rainbow Piece ships an update every 3 months, and POYOJI every 2 months. Most recently, Rainbow Piece was updated on September 30, 2026 and POYOJI on September 30, 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.*