# Fun With Sudoku vs rairyu

The clearest difference is update cadence: Fun With Sudoku at every 3 days against rairyu's every 3 weeks. On price, ads, 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.

Fun With Sudoku ships an update every 3 days, rairyu every 3 weeks. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fun With Sudoku | rairyu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 20 MB | 29 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kitamura hira](https://appshunter.io/developer/324426988) | [鹏 孙](https://appshunter.io/developer/6782364248) |

## What reviewers say

### Fun With Sudoku

[App page](https://appshunter.io/ios/app/fun-with-sudoku/id6451387646)

**Features:** macOS Compatibility

**In-app purchases:** none


### rairyu

[App page](https://appshunter.io/ios/app/rairyu/id6782716628)

**In-app purchases:** none


## Frequently asked questions

### Is Fun With Sudoku free?

Fun With Sudoku is free to download, with no in-app purchases.

### Is rairyu free?

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

### Do Fun With Sudoku or rairyu have ads?

Neither Fun With Sudoku nor rairyu shows ads.

### Which is updated more often, Fun With Sudoku or rairyu?

Fun With Sudoku ships an update every 3 days, and rairyu every 3 weeks. Most recently, Fun With Sudoku was updated on November 3, 2026 and rairyu 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.*