# 素因数分解クイズ vs MindSpark

The clearest difference is in-app purchases: 素因数分解クイズ at none against MindSpark's 1. 素因数分解クイズ also leads on update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MindSpark sells 1 one-off in-app purchase. 素因数分解クイズ asks for nothing beyond the download.

素因数分解クイズ ships an update every 5 days, MindSpark every 3 weeks. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 素因数分解クイズ | MindSpark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 26 MB | 6 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YUKI WATANABE](https://appshunter.io/developer/1724288537) | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) |

## 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


### MindSpark

[App page](https://appshunter.io/ios/app/mindspark-brain-age-test/id6789515695)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## 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 MindSpark free?

MindSpark is free to download, with in-app purchases available.

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

Both 素因数分解クイズ and MindSpark show ads.

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

素因数分解クイズ ships an update every 5 days, and MindSpark every 3 weeks. Most recently, 素因数分解クイズ was updated on October 6, 2026 and MindSpark on October 15, 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.*