# 危険物乙4 過去問・問題集 vs 電気工事士 危険物乙4 過去問 問題集 一問一答

The clearest difference is in-app purchases: 危険物乙4 過去問・問題集 at none against 電気工事士 危険物乙4 過去問 問題集 一問一答's 3. 危険物乙4 過去問・問題集 also leads on iOS requirement (13.0 vs 16.0). 電気工事士 危険物乙4 過去問 問題集 一問一答's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. 電気工事士 危険物乙4 過去問 問題集 一問一答 sells 3 in-app purchases, starting at $9.99 per month. 危険物乙4 過去問・問題集 asks for nothing beyond the download.

危険物乙4 過去問・問題集 ships an update every 2 weeks, 電気工事士 危険物乙4 過去問 問題集 一問一答 every 3 weeks. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 危険物乙4 過去問・問題集 | 電気工事士 危険物乙4 過去問 問題集 一問一答 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Ad-supported | — |
| Size | 43 MB | 194 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Naoto Baba](https://appshunter.io/developer/1445524034) | [Shanghai Xushu Information Technology Co., Ltd.](https://appshunter.io/developer/1733615663) |

## 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


### 電気工事士 危険物乙4 過去問 問題集 一問一答

[App page](https://appshunter.io/ios/app/4/id6786999430)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 月額プラン | $9.99 | per month |
| Pro 3か月プラン | $19.99 | per 3 months |
| Pro 買い切り（永久） | $39.99 | one-time |


## 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 電気工事士 危険物乙4 過去問 問題集 一問一答 free?

電気工事士 危険物乙4 過去問 問題集 一問一答 is free to download, with in-app purchases available.

### Do 危険物乙4 過去問・問題集 or 電気工事士 危険物乙4 過去問 問題集 一問一答 have ads?

危険物乙4 過去問・問題集 shows ads; 電気工事士 危険物乙4 過去問 問題集 一問一答 does not.

### Which is updated more often, 危険物乙4 過去問・問題集 or 電気工事士 危険物乙4 過去問 問題集 一問一答?

危険物乙4 過去問・問題集 ships an update every 2 weeks, and 電気工事士 危険物乙4 過去問 問題集 一問一答 every 3 weeks. Most recently, 危険物乙4 過去問・問題集 was updated on September 26, 2026 and 電気工事士 危険物乙4 過去問 問題集 一問一答 on September 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.*