# 危険物乙4 合格対策 vs 二級ボイラー技士Pass

The clearest difference is device support: 二級ボイラー技士Pass at 2 against 危険物乙4 合格対策's —. 危険物乙4 合格対策's advantage is iOS requirement (13.0 vs 15.1). On price and in-app purchases there is nothing between them.

Both are free to download. 危険物乙4 合格対策 sells 1 one-off in-app purchase and 二級ボイラー技士Pass sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 危険物乙4 合格対策 | 二級ボイラー技士Pass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | Yes |
| Update frequency | — | Weekly |
| Size | 132 MB | 45 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jongmin Kim](https://appshunter.io/developer/1693759760) | [KANDK](https://appshunter.io/developer/1867080143) |

## 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 |


### 二級ボイラー技士Pass

[App page](https://appshunter.io/ios/app/pass/id6767974457)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム | $1.99 | one-time |


## 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 二級ボイラー技士Pass free?

二級ボイラー技士Pass is free to download, with in-app purchases available.

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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.*