# 危険物乙4コンプリートマスター解説付 vs オツスキ！：仕事の合間で受かる乙4

The clearest difference is ads: 危険物乙4コンプリートマスター解説付 at none against オツスキ！：仕事の合間で受かる乙4's shown. オツスキ！：仕事の合間で受かる乙4's advantage is update cadence (daily vs every 6 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 危険物乙4コンプリートマスター解説付 sells 2 in-app purchases, starting at $2.99 per month and オツスキ！：仕事の合間で受かる乙4 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

危険物乙4コンプリートマスター解説付 ships an update every 6 days, オツスキ！：仕事の合間で受かる乙4 daily. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 危険物乙4コンプリートマスター解説付 | オツスキ！：仕事の合間で受かる乙4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | **Daily** |
| Size | 108 MB | 30 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BEAK,K.K.](https://appshunter.io/developer/1808079760) | [NAGAKAWA MASAHIKO](https://appshunter.io/developer/1872718412) |

## What reviewers say

### 危険物乙4コンプリートマスター解説付

[App page](https://appshunter.io/ios/app/4/id6772826132)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 危険物乙4サブスクリプション | $2.99 | per month |
| 危険物乙4買い切りプラン | $22.99 | one-time |


### オツスキ！：仕事の合間で受かる乙4

[App page](https://appshunter.io/ios/app/4/id6801225154)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム | $2.99 | one-time |


## Frequently asked questions

### Is 危険物乙4コンプリートマスター解説付 free?

危険物乙4コンプリートマスター解説付 is free to download, with in-app purchases available.

### Is オツスキ！：仕事の合間で受かる乙4 free?

オツスキ！：仕事の合間で受かる乙4 is free to download, with in-app purchases available.

### Do 危険物乙4コンプリートマスター解説付 or オツスキ！：仕事の合間で受かる乙4 have ads?

オツスキ！：仕事の合間で受かる乙4 shows ads; 危険物乙4コンプリートマスター解説付 does not.

### Which is updated more often, 危険物乙4コンプリートマスター解説付 or オツスキ！：仕事の合間で受かる乙4?

危険物乙4コンプリートマスター解説付 ships an update every 6 days, and オツスキ！：仕事の合間で受かる乙4 daily. Most recently, 危険物乙4コンプリートマスター解説付 was updated on September 23, 2026 and オツスキ！：仕事の合間で受かる乙4 on September 29, 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.*