# 甲種危険物取扱者 一問一答問題集 vs うちの危険物乙4種ノート

The clearest difference is in-app purchases: うちの危険物乙4種ノート at none against 甲種危険物取扱者 一問一答問題集's 1. 甲種危険物取扱者 一問一答問題集's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 甲種危険物取扱者 一問一答問題集 sells 1 one-off in-app purchase. うちの危険物乙4種ノート asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 甲種危険物取扱者 一問一答問題集 | うちの危険物乙4種ノート |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | Every 5 days |
| Size | 10 MB | 15 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Particles and Waves](https://appshunter.io/developer/1812653811) | [Yutarou Nagano](https://appshunter.io/developer/6784878764) |

## What reviewers say

### 甲種危険物取扱者 一問一答問題集

[App page](https://appshunter.io/ios/app/id6801183669)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Full Unlock) | $2.99 | one-time |


### うちの危険物乙4種ノート

[App page](https://appshunter.io/ios/app/4/id6801598267)

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

**In-app purchases:** none


## Frequently asked questions

### Is 甲種危険物取扱者 一問一答問題集 free?

甲種危険物取扱者 一問一答問題集 is free to download, with in-app purchases available.

### Is うちの危険物乙4種ノート free?

うちの危険物乙4種ノート is free to download, with no in-app purchases.

### Do 甲種危険物取扱者 一問一答問題集 or うちの危険物乙4種ノート have ads?

うちの危険物乙4種ノート shows ads; 甲種危険物取扱者 一問一答問題集 does not.

### Which is updated more often, 甲種危険物取扱者 一問一答問題集 or うちの危険物乙4種ノート?

甲種危険物取扱者 一問一答問題集 ships an update every 5 days, and うちの危険物乙4種ノート every 5 days. Most recently, 甲種危険物取扱者 一問一答問題集 was updated on October 9, 2026 and うちの危険物乙4種ノート on October 14, 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.*