# 危険物乙4 問題集 vs 危険物乙4・乙種全類 一問一答問題集

危険物乙4 問題集 and 危険物乙4・乙種全類 一問一答問題集 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 危険物乙4 問題集 sells 1 one-off in-app purchase and 危険物乙4・乙種全類 一問一答問題集 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

危険物乙4 問題集 ships an update weekly, 危険物乙4・乙種全類 一問一答問題集 every 5 days. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 危険物乙4 問題集 | 危険物乙4・乙種全類 一問一答問題集 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 14 MB | 10 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RIVERSHIP](https://appshunter.io/developer/6780804499) | [Particles and Waves](https://appshunter.io/developer/1812653811) |

## What reviewers say

### 危険物乙4 問題集

[App page](https://appshunter.io/ios/app/4/id6785840919)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全問題アンロック | $4.99 | one-time |


### 危険物乙4・乙種全類 一問一答問題集

[App page](https://appshunter.io/ios/app/4/id6801183486)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is 危険物乙4 問題集 free?

危険物乙4 問題集 is free to download, with in-app purchases available.

### Is 危険物乙4・乙種全類 一問一答問題集 free?

危険物乙4・乙種全類 一問一答問題集 is free to download, with in-app purchases available.

### Do 危険物乙4 問題集 or 危険物乙4・乙種全類 一問一答問題集 have ads?

Neither 危険物乙4 問題集 nor 危険物乙4・乙種全類 一問一答問題集 shows ads.

### Which is updated more often, 危険物乙4 問題集 or 危険物乙4・乙種全類 一問一答問題集?

危険物乙4 問題集 ships an update weekly, and 危険物乙4・乙種全類 一問一答問題集 every 5 days. Most recently, 危険物乙4 問題集 was updated on October 11, 2026 and 危険物乙4・乙種全類 一問一答問題集 on October 9, 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.*