# 危険物乙4 合格ドリル vs 危険物乙4Pass

The clearest difference is in-app purchases: 危険物乙4 合格ドリル at none against 危険物乙4Pass's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 危険物乙4Pass 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. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 危険物乙4 合格ドリル | 危険物乙4Pass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Size | 53 MB | 43 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [KANDK](https://appshunter.io/developer/1867080143) |

## 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4Pass

[App page](https://appshunter.io/ios/app/4pass-4/id6768249746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $1.99 | 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4Pass free?

危険物乙4Pass 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4Pass have ads?

Both 危険物乙4 合格ドリル and 危険物乙4Pass show ads.

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

危険物乙4 合格ドリル ships an update weekly, and 危険物乙4Pass weekly. Most recently, 危険物乙4 合格ドリル was updated on October 11, 2026 and 危険物乙4Pass on October 10, 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.*