# 二級ボイラー技士Pass vs オツスキ！：仕事の合間で受かる乙4

The clearest difference is update cadence: オツスキ！：仕事の合間で受かる乙4 at daily against 二級ボイラー技士Pass's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 二級ボイラー技士Pass sells 1 one-off in-app purchase and オツスキ！：仕事の合間で受かる乙4 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

二級ボイラー技士Pass ships an update weekly, オツスキ！：仕事の合間で受かる乙4 daily. The most recent releases landed on September 9, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 二級ボイラー技士Pass | オツスキ！：仕事の合間で受かる乙4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Daily** |
| Size | 45 MB | 30 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KANDK](https://appshunter.io/developer/1867080143) | [NAGAKAWA MASAHIKO](https://appshunter.io/developer/1872718412) |

## What reviewers say

### 二級ボイラー技士Pass

[App page](https://appshunter.io/ios/app/pass/id6767974457)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム | $1.99 | one-time |


### オツスキ！：仕事の合間で受かる乙4

[App page](https://appshunter.io/ios/app/4/id6801225154)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム | $2.99 | one-time |


## Frequently asked questions

### Is 二級ボイラー技士Pass free?

二級ボイラー技士Pass is free to download, with in-app purchases available.

### Is オツスキ！：仕事の合間で受かる乙4 free?

オツスキ！：仕事の合間で受かる乙4 is free to download, with in-app purchases available.

### Do 二級ボイラー技士Pass or オツスキ！：仕事の合間で受かる乙4 have ads?

Both 二級ボイラー技士Pass and オツスキ！：仕事の合間で受かる乙4 show ads.

### Which is updated more often, 二級ボイラー技士Pass or オツスキ！：仕事の合間で受かる乙4?

二級ボイラー技士Pass ships an update weekly, and オツスキ！：仕事の合間で受かる乙4 daily. Most recently, 二級ボイラー技士Pass was updated on September 9, 2026 and オツスキ！：仕事の合間で受かる乙4 on September 29, 2026.

---

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