# ムー vs Chieumi

The clearest difference is in-app purchases: Chieumi at none against ムー's 3. Chieumi also leads on update cadence (every 2 months vs every 40 months). ムー's advantage is iOS requirement (9.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. ムー sells 3 in-app purchases, starting at $6.99 per month. Chieumi asks for nothing beyond the download.

ムー ships an update every 40 months, Chieumi every 2 months. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ムー | Chieumi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 2 months** |
| Size | 21 MB | 52 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gakken CO.,LTD](https://appshunter.io/developer/294791161) | [KOSEI PUBLISHING CO.](https://appshunter.io/developer/1626942067) |

## What reviewers say

### ムー

[App page](https://appshunter.io/ios/app/id1004467935)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| mu | $6.99 | per month |
| mu | $17.49 | per 3 months |
| mu | $33.99 | per 6 months |


### Chieumi

[App page](https://appshunter.io/ios/app/chieumi/id1626941855)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ムー free?

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

### Is Chieumi free?

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

### Do ムー or Chieumi have ads?

Neither ムー nor Chieumi shows ads.

### Which is updated more often, ムー or Chieumi?

ムー ships an update every 40 months, and Chieumi every 2 months. Most recently, ムー was updated on October 26, 2026 and Chieumi on October 16, 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.*