# 2級ボイラーの森 vs 高圧ガス製造保安責任者

The clearest difference is update cadence: 2級ボイラーの森 at every 3 weeks against 高圧ガス製造保安責任者's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 2級ボイラーの森 sells 1 one-off in-app purchase and 高圧ガス製造保安責任者 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

2級ボイラーの森 ships an update every 3 weeks, 高圧ガス製造保安責任者 every 10 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 2級ボイラーの森 | 高圧ガス製造保安責任者 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Size | 99 MB | 5 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [合同会社OLA](https://appshunter.io/developer/1832165711) | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) |

## What reviewers say

### 2級ボイラーの森

[App page](https://appshunter.io/ios/app/2/id6747311296)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| すべての年度がアンロックされます | $3.99 | one-time |


### 高圧ガス製造保安責任者

[App page](https://appshunter.io/ios/app/id6757629816)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高圧ガス製造保安責任者（乙種機械） 試験対策 | $4.99 | one-time |


## Frequently asked questions

### Is 2級ボイラーの森 free?

2級ボイラーの森 is free to download, with in-app purchases available.

### Is 高圧ガス製造保安責任者 free?

高圧ガス製造保安責任者 is free to download, with in-app purchases available.

### Do 2級ボイラーの森 or 高圧ガス製造保安責任者 have ads?

Neither 2級ボイラーの森 nor 高圧ガス製造保安責任者 shows ads.

### Which is updated more often, 2級ボイラーの森 or 高圧ガス製造保安責任者?

2級ボイラーの森 ships an update every 3 weeks, and 高圧ガス製造保安責任者 every 10 months. Most recently, 2級ボイラーの森 was updated on October 25, 2026 and 高圧ガス製造保安責任者 on October 28, 2026.

---

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