# Sosu der vs 素因数分解クイズ

The clearest difference is update cadence: 素因数分解クイズ at every 5 days against Sosu der's every 4 months. 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.

Sosu der ships an update every 4 months, 素因数分解クイズ every 5 days. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Sosu der | 素因数分解クイズ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 140 MB | 26 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hirobumi Onishi](https://appshunter.io/developer/1740115066) | [YUKI WATANABE](https://appshunter.io/developer/1724288537) |

## What reviewers say

### Sosu der

[App page](https://appshunter.io/ios/app/sosu-der/id6483364985)

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

**In-app purchases:** none


### 素因数分解クイズ

[App page](https://appshunter.io/ios/app/1/id6740989986)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sosu der free?

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

### Is 素因数分解クイズ free?

素因数分解クイズ is free to download, with no in-app purchases.

### Do Sosu der or 素因数分解クイズ have ads?

Both Sosu der and 素因数分解クイズ show ads.

### Which is updated more often, Sosu der or 素因数分解クイズ?

Sosu der ships an update every 4 months, and 素因数分解クイズ every 5 days. Most recently, Sosu der was updated on October 1, 2026 and 素因数分解クイズ on October 6, 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.*