# Space Master vs こどもサイズ帳

The clearest difference is ads: こどもサイズ帳 at none against Space Master's shown. こどもサイズ帳 also leads on iOS requirement (17.6 vs 26.0). Space Master's advantage is update cadence (every 5 days vs fortnightly). On price, 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.

Space Master ships an update every 5 days, こどもサイズ帳 fortnightly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Space Master | こどもサイズ帳 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Fortnightly |
| Size | 9 MB | 10 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ISHIFUKU JUNYA](https://appshunter.io/developer/1857168754) | [Mami Kawai](https://appshunter.io/developer/1890495943) |

## What reviewers say

### Space Master

[App page](https://appshunter.io/ios/app/space-master/id6758099865)

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

**In-app purchases:** none


### こどもサイズ帳

[App page](https://appshunter.io/ios/app/id6767790620)

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

**In-app purchases:** none


## Frequently asked questions

### Is Space Master free?

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

### Is こどもサイズ帳 free?

こどもサイズ帳 is free to download, with no in-app purchases.

### Do Space Master or こどもサイズ帳 have ads?

Space Master shows ads; こどもサイズ帳 does not.

### Which is updated more often, Space Master or こどもサイズ帳?

Space Master ships an update every 5 days, and こどもサイズ帳 fortnightly. Most recently, Space Master was updated on October 13, 2026 and こどもサイズ帳 on October 25, 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.*