# 素因数分解クイズ vs Brain Training

The clearest difference is ads: Brain Training at none against 素因数分解クイズ's shown. 素因数分解クイズ's advantage is update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

素因数分解クイズ ships an update every 5 days, Brain Training every 3 weeks. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 素因数分解クイズ | Brain Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 26 MB | 2 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YUKI WATANABE](https://appshunter.io/developer/1724288537) | [Hyunwoo Lee](https://appshunter.io/developer/1883358620) |

## What reviewers say

### 素因数分解クイズ

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Brain Training

[App page](https://appshunter.io/ios/app/brain-training-brain-age-test/id6789837132)

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

**In-app purchases:** none


## Frequently asked questions

### 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.

### Is Brain Training free?

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

### Do 素因数分解クイズ or Brain Training have ads?

素因数分解クイズ shows ads; Brain Training does not.

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

素因数分解クイズ ships an update every 5 days, and Brain Training every 3 weeks. Most recently, 素因数分解クイズ was updated on October 6, 2026 and Brain Training on October 4, 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.*