# 危険物乙4 過去問・問題集 vs 高圧ガス製造保安責任者試験 合格ドリル

The clearest difference is ads: 高圧ガス製造保安責任者試験 合格ドリル at none against 危険物乙4 過去問・問題集's shown. 危険物乙4 過去問・問題集's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, 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.

危険物乙4 過去問・問題集 ships an update every 2 weeks, 高圧ガス製造保安責任者試験 合格ドリル every 9 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 危険物乙4 過去問・問題集 | 高圧ガス製造保安責任者試験 合格ドリル |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 43 MB | 52 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Naoto Baba](https://appshunter.io/developer/1445524034) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### 危険物乙4 過去問・問題集

[App page](https://appshunter.io/ios/app/4/id6766231307)

This app helps you prepare for the Class B, Type 4 hazardous materials handler exam. It offers practice questions, targeted drills, and mock tests to support self-study and efficient learning during your commute or breaks.

**Highlights:** Past exam questions and explanations, Subject-specific practice, Weakness review, Mock exams, Study history visualization, Bookmarks, Dark mode

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

**In-app purchases:** none


### 高圧ガス製造保安責任者試験 合格ドリル

[App page](https://appshunter.io/ios/app/id6766356552)

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

**In-app purchases:** none


## Frequently asked questions

### Is 危険物乙4 過去問・問題集 free?

危険物乙4 過去問・問題集 is free to download, with no in-app purchases.

### Is 高圧ガス製造保安責任者試験 合格ドリル free?

高圧ガス製造保安責任者試験 合格ドリル is free to download, with no in-app purchases.

### Do 危険物乙4 過去問・問題集 or 高圧ガス製造保安責任者試験 合格ドリル have ads?

危険物乙4 過去問・問題集 shows ads; 高圧ガス製造保安責任者試験 合格ドリル does not.

### Which is updated more often, 危険物乙4 過去問・問題集 or 高圧ガス製造保安責任者試験 合格ドリル?

危険物乙4 過去問・問題集 ships an update every 2 weeks, and 高圧ガス製造保安責任者試験 合格ドリル every 9 days. Most recently, 危険物乙4 過去問・問題集 was updated on October 12, 2026 and 高圧ガス製造保安責任者試験 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.*