# CommonDivisor vs Mahoujin

The clearest difference is ads: Mahoujin at none against CommonDivisor's shown. On price, update cadence, 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.

CommonDivisor ships an update weekly, Mahoujin every 9 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CommonDivisor | Mahoujin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 9 days |
| Size | 19 MB | 29 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [Takashi Iwasaki](https://appshunter.io/developer/1868144425) |

## What reviewers say

### CommonDivisor

[App page](https://appshunter.io/ios/app/commondivisor/id6746661138)

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

**In-app purchases:** none


### Mahoujin

[App page](https://appshunter.io/ios/app/mahoujin-magic-square/id6811444372)

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

**In-app purchases:** none


## Frequently asked questions

### Is CommonDivisor free?

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

### Is Mahoujin free?

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

### Do CommonDivisor or Mahoujin have ads?

CommonDivisor shows ads; Mahoujin does not.

### Which is updated more often, CommonDivisor or Mahoujin?

CommonDivisor ships an update weekly, and Mahoujin every 9 days. Most recently, CommonDivisor was updated on October 30, 2026 and Mahoujin 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.*