# 危険物乙4 合格対策 vs 高圧ガス製造保安責任者 丙種化学（特別試験科目）

The clearest difference is price: 危険物乙4 合格対策 at Free against 高圧ガス製造保安責任者 丙種化学（特別試験科目）'s $1.99. 危険物乙4 合格対策 also leads on iOS requirement (13.0 vs 17.0). 高圧ガス製造保安責任者 丙種化学（特別試験科目）'s advantage is in-app purchases (none vs 1) and device support.

危険物乙4 合格対策 is free to download; 高圧ガス製造保安責任者 丙種化学（特別試験科目） costs $1.99 up front. 危険物乙4 合格対策 sells 1 one-off in-app purchase. 高圧ガス製造保安責任者 丙種化学（特別試験科目） asks for nothing beyond the download.

## The numbers

| Metric | 危険物乙4 合格対策 | 高圧ガス製造保安責任者 丙種化学（特別試験科目） |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Size | 132 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Jongmin Kim](https://appshunter.io/developer/1693759760) | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) |

## What reviewers say

### 危険物乙4 合格対策

[App page](https://appshunter.io/ios/app/4/id6760637063)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除プレミアム | $2.99 | one-time |


### 高圧ガス製造保安責任者 丙種化学（特別試験科目）

[App page](https://appshunter.io/ios/app/id6777429981)

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

**In-app purchases:** none


## Frequently asked questions

### Is 危険物乙4 合格対策 free?

危険物乙4 合格対策 is free to download, with in-app purchases available.

### Is 高圧ガス製造保安責任者 丙種化学（特別試験科目） free?

高圧ガス製造保安責任者 丙種化学（特別試験科目） costs $1.99, with no in-app purchases.

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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.*