# 管業の森 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 管業の森's 1. うちの危険物乙4種ノート also leads on update cadence (every 5 days vs every 2 months). 管業の森's advantage is ads (none vs shown) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. 管業の森 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.

管業の森 ships an update every 2 months, うちの危険物乙4種ノート every 5 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 管業の森 | 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 2 months | **Every 5 days** |
| Size | 102 MB | 15 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [合同会社OLA](https://appshunter.io/developer/1832165711) | [Yutarou Nagano](https://appshunter.io/developer/6784878764) |

## 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 |


### 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 管業の森 free?

管業の森 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 管業の森 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; 管業の森 does not.

### Which is updated more often, 管業の森 or うちの危険物乙4種ノート?

管業の森 ships an update every 2 months, and うちの危険物乙4種ノート every 5 days. Most recently, 管業の森 was updated on October 12, 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.*