# 危険物乙4 合格ドリル vs セーフティサブアセッサー

The clearest difference is price: 危険物乙4 合格ドリル at Free against セーフティサブアセッサー's $4.99. 危険物乙4 合格ドリル also leads on update cadence (weekly vs every 6 weeks). セーフティサブアセッサー's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

危険物乙4 合格ドリル is free to download; セーフティサブアセッサー costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

危険物乙4 合格ドリル ships an update weekly, セーフティサブアセッサー every 6 weeks. The most recent releases landed on October 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 危険物乙4 合格ドリル | セーフティサブアセッサー |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 6 weeks |
| Size | 53 MB | 34 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## 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


### セーフティサブアセッサー

[App page](https://appshunter.io/ios/app/id6764770198)

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

**In-app purchases:** none


## 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 セーフティサブアセッサー free?

セーフティサブアセッサー costs $4.99, with no in-app purchases.

### Do 危険物乙4 合格ドリル or セーフティサブアセッサー have ads?

危険物乙4 合格ドリル shows ads; セーフティサブアセッサー does not.

### Which is updated more often, 危険物乙4 合格ドリル or セーフティサブアセッサー?

危険物乙4 合格ドリル ships an update weekly, and セーフティサブアセッサー every 6 weeks. Most recently, 危険物乙4 合格ドリル was updated on October 11, 2026 and セーフティサブアセッサー on September 18, 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.*