# 危険物乙4 合格ドリル 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 合格ドリル 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 合格ドリル also leads on update cadence (weekly vs every 3 weeks). 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, device support and iOS requirement 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 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, 電気工事士 危険物乙4 過去問 問題集 一問一答 every 3 weeks. Both last shipped on September 25, 2026.

## The numbers

| Metric | 危険物乙4 合格ドリル | 電気工事士 危険物乙4 過去問 問題集 一問一答 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 53 MB | 194 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [Shanghai Xushu Information Technology Co., Ltd.](https://appshunter.io/developer/1733615663) |

## 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


### 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 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 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 合格ドリル 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 合格ドリル 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 合格ドリル 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 合格ドリル ships an update weekly, 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 合格ドリル was updated on September 25, 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.*