# 素因数分解クイズ vs 暗号名探偵

The clearest difference is in-app purchases: 素因数分解クイズ at none against 暗号名探偵's 4. 暗号名探偵's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 暗号名探偵 sells 4 in-app purchases, starting at $2.99 per 7 days. 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, 暗号名探偵 every 3 days. The most recent releases landed on October 6, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 素因数分解クイズ | 暗号名探偵 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 3 days** |
| Size | 26 MB | 47 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YUKI WATANABE](https://appshunter.io/developer/1724288537) | [Yuta Matsuda](https://appshunter.io/developer/1788852960) |

## 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


### 暗号名探偵

[App page](https://appshunter.io/ios/app/id6742340170)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan (1 Week) | $2.99 | per 7 days |
| Premium Plan (1 Month) | $4.99 | per month |
| Premium Plan (3 Months) | $9.99 | per 3 months |
| Premium Plan (1 Year) | $19.99 | per year |


## 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 暗号名探偵 free?

暗号名探偵 is free to download, with in-app purchases available.

### Do 素因数分解クイズ or 暗号名探偵 have ads?

素因数分解クイズ shows ads; 暗号名探偵 does not.

### Which is updated more often, 素因数分解クイズ or 暗号名探偵?

素因数分解クイズ ships an update every 5 days, and 暗号名探偵 every 3 days. Most recently, 素因数分解クイズ was updated on October 6, 2026 and 暗号名探偵 on September 28, 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.*