# マン管の森 vs 危険物乙4Pass

The clearest difference is ads: マン管の森 at none against 危険物乙4Pass's shown. マン管の森 also leads on iOS requirement (13.0 vs 15.1). 危険物乙4Pass's advantage is update cadence (weekly vs monthly). On price, in-app purchases and device support 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4Pass 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4Pass weekly. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | マン管の森 | 危険物乙4Pass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Size | 99 MB | 43 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [合同会社OLA](https://appshunter.io/developer/1832165711) | [KANDK](https://appshunter.io/developer/1867080143) |

## 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4Pass

[App page](https://appshunter.io/ios/app/4pass-4/id6768249746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $1.99 | 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4Pass free?

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

### Do マン管の森 or 危険物乙4Pass have ads?

危険物乙4Pass shows ads; マン管の森 does not.

### Which is updated more often, マン管の森 or 危険物乙4Pass?

マン管の森 ships an update monthly, and 危険物乙4Pass weekly. Most recently, マン管の森 was updated on October 24, 2026 and 危険物乙4Pass on October 31, 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.*