# 二級ボイラー技士＜対策シリーズ＞ vs 2級ボイラーの森

The clearest difference is ads: 2級ボイラーの森 at none against 二級ボイラー技士＜対策シリーズ＞'s shown. 二級ボイラー技士＜対策シリーズ＞'s advantage is update cadence (weekly vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 二級ボイラー技士＜対策シリーズ＞ sells 1 one-off in-app purchase and 2級ボイラーの森 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＜対策シリーズ＞ ships an update weekly, 2級ボイラーの森 every 3 weeks. Both last shipped on September 12, 2026.

## The numbers

| Metric | 二級ボイラー技士＜対策シリーズ＞ | 2級ボイラーの森 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 106 MB | 99 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Katsuhisa Irie](https://appshunter.io/developer/1592415462) | [合同会社OLA](https://appshunter.io/developer/1832165711) |

## What reviewers say

### 二級ボイラー技士＜対策シリーズ＞

[App page](https://appshunter.io/ios/app/id6737748481)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $3.99 | one-time |


### 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 | $2.99 | one-time |


## Frequently asked questions

### Is 二級ボイラー技士＜対策シリーズ＞ free?

二級ボイラー技士＜対策シリーズ＞ is free to download, with in-app purchases available.

### 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.

### Do 二級ボイラー技士＜対策シリーズ＞ or 2級ボイラーの森 have ads?

二級ボイラー技士＜対策シリーズ＞ shows ads; 2級ボイラーの森 does not.

### Which is updated more often, 二級ボイラー技士＜対策シリーズ＞ or 2級ボイラーの森?

二級ボイラー技士＜対策シリーズ＞ ships an update weekly, and 2級ボイラーの森 every 3 weeks. Most recently, 二級ボイラー技士＜対策シリーズ＞ was updated on September 12, 2026 and 2級ボイラーの森 on September 12, 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.*