# マン管の森 vs 危険物乙4・乙種全類 一問一答問題集

The clearest difference is update cadence: 危険物乙4・乙種全類 一問一答問題集 at every 4 days against マン管の森's monthly. マン管の森's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. マン管の森 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.

マン管の森 ships an update monthly, 危険物乙4・乙種全類 一問一答問題集 every 4 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | マン管の森 | 危険物乙4・乙種全類 一問一答問題集 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 99 MB | 11 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [合同会社OLA](https://appshunter.io/developer/1832165711) | [Particles and Waves](https://appshunter.io/developer/1812653811) |

## What reviewers say

### マン管の森

[App page](https://appshunter.io/ios/app/id6763821350)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全年度アンロック | $2.99 | 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)

This app offers a question-and-answer format with detailed explanations for Japanese hazardous materials handler qualification exams. It covers various categories of hazardous materials and includes practice tests to assess readiness. Users can track progress and identify weak areas for targeted study.

**Highlights:** Q&A format for key topics, Detailed explanations for all answer choices, Practice tests simulating exam conditions, Progress tracking and weak point identification, Anonymous error reporting and correction, Study planning based on exam date

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is マン管の森 free?

マン管の森 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 マン管の森 or 危険物乙4・乙種全類 一問一答問題集 have ads?

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

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

マン管の森 ships an update monthly, and 危険物乙4・乙種全類 一問一答問題集 every 4 days. Most recently, マン管の森 was updated on October 24, 2026 and 危険物乙4・乙種全類 一問一答問題集 on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*