# 危険物乙4 合格ドリル vs 危険物乙4 問題集

The clearest difference is in-app purchases: 危険物乙4 合格ドリル at none against 危険物乙4 問題集's 1. 危険物乙4 合格ドリル also leads on iOS requirement (15.1 vs 17.0). 危険物乙4 問題集's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. 危険物乙4 問題集 sells 1 one-off in-app purchase. 危険物乙4 合格ドリル asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 11, 2026.

## The numbers

| Metric | 危険物乙4 合格ドリル | 危険物乙4 問題集 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | Weekly |
| Size | 53 MB | 14 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [RIVERSHIP](https://appshunter.io/developer/6780804499) |

## What reviewers say

### 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


### 危険物乙4 問題集

[App page](https://appshunter.io/ios/app/4/id6785840919)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全問題アンロック | $4.99 | one-time |


## Frequently asked questions

### 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.

### Is 危険物乙4 問題集 free?

危険物乙4 問題集 is free to download, with in-app purchases available.

### Do 危険物乙4 合格ドリル or 危険物乙4 問題集 have ads?

危険物乙4 合格ドリル shows ads; 危険物乙4 問題集 does not.

### Which is updated more often, 危険物乙4 合格ドリル or 危険物乙4 問題集?

危険物乙4 合格ドリル ships an update weekly, and 危険物乙4 問題集 weekly. Most recently, 危険物乙4 合格ドリル was updated on October 11, 2026 and 危険物乙4 問題集 on October 11, 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.*