# 危険物乙4 合格ドリル vs 乙4

The clearest difference is in-app purchases: 危険物乙4 合格ドリル at none against 乙4's 1. 危険物乙4 合格ドリル also leads on update cadence (weekly vs monthly) and device support (3 vs 1). 乙4's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. 乙4 sells 1 in-app purchase, starting at $4.99 per 7 days. 危険物乙4 合格ドリル asks for nothing beyond the download.

危険物乙4 合格ドリル ships an update weekly, 乙4 monthly. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 危険物乙4 合格ドリル | 乙4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Size | 53 MB | 2 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [CapCat LLC](https://appshunter.io/developer/1654095841) |

## 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


### 乙4

[App page](https://appshunter.io/ios/app/4-4-2026/id6764290217)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 無料でお試しする | $4.99 | per 7 days |


## 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 乙4 free?

乙4 is free to download, with in-app purchases available.

### Do 危険物乙4 合格ドリル or 乙4 have ads?

危険物乙4 合格ドリル shows ads; 乙4 does not.

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

危険物乙4 合格ドリル ships an update weekly, and 乙4 monthly. Most recently, 危険物乙4 合格ドリル was updated on October 11, 2026 and 乙4 on October 13, 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.*