# 危険物取扱者乙種第四類 vs 危険物乙4 合格ドリル

The clearest difference is update cadence: 危険物乙4 合格ドリル at weekly against 危険物取扱者乙種第四類's every 2 months. 危険物取扱者乙種第四類's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

危険物取扱者乙種第四類 ships an update every 2 months, 危険物乙4 合格ドリル weekly. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 危険物取扱者乙種第四類 | 危険物乙4 合格ドリル |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 13 MB | 53 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Maiji Saito](https://appshunter.io/developer/671719488) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### 危険物取扱者乙種第四類

[App page](https://appshunter.io/ios/app/id671719485)

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

**In-app purchases:** none


### 危険物乙4 合格ドリル

[App page](https://appshunter.io/ios/app/4/id6761160536)

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

**In-app purchases:** none


## Frequently asked questions

### Is 危険物取扱者乙種第四類 free?

危険物取扱者乙種第四類 is free to download, with no in-app purchases.

### Is 危険物乙4 合格ドリル free?

危険物乙4 合格ドリル is free to download, with no in-app purchases.

### Do 危険物取扱者乙種第四類 or 危険物乙4 合格ドリル have ads?

Both 危険物取扱者乙種第四類 and 危険物乙4 合格ドリル show ads.

### Which is updated more often, 危険物取扱者乙種第四類 or 危険物乙4 合格ドリル?

危険物取扱者乙種第四類 ships an update every 2 months, and 危険物乙4 合格ドリル weekly. Most recently, 危険物取扱者乙種第四類 was updated on October 11, 2026 and 危険物乙4 合格ドリル on October 25, 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.*