# 管業の森 vs 危険物乙4 問題集

The clearest difference is update cadence: 危険物乙4 問題集 at weekly against 管業の森's every 2 months. 管業の森's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 管業の森 sells 1 one-off in-app purchase and 危険物乙4 問題集 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

管業の森 ships an update every 2 months, 危険物乙4 問題集 weekly. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 管業の森 | 危険物乙4 問題集 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 102 MB | 14 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [合同会社OLA](https://appshunter.io/developer/1832165711) | [RIVERSHIP](https://appshunter.io/developer/6780804499) |

## What reviewers say

### 管業の森

[App page](https://appshunter.io/ios/app/id6760410488)

**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 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 |


## Frequently asked questions

### Is 管業の森 free?

管業の森 is free to download, with in-app purchases available.

### 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.

### Do 管業の森 or 危険物乙4 問題集 have ads?

Neither 管業の森 nor 危険物乙4 問題集 shows ads.

### Which is updated more often, 管業の森 or 危険物乙4 問題集?

管業の森 ships an update every 2 months, and 危険物乙4 問題集 weekly. Most recently, 管業の森 was updated on October 12, 2026 and 危険物乙4 問題集 on October 11, 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.*