# 2級ボイラー技士問題集lite　りすさんシリーズ vs おつよん

The clearest difference is ads: 2級ボイラー技士問題集lite　りすさんシリーズ at none against おつよん's shown. おつよん's advantage is update cadence (fortnightly vs every 16 months) and iOS requirement (14.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

2級ボイラー技士問題集lite　りすさんシリーズ ships an update every 16 months, おつよん fortnightly. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 2級ボイラー技士問題集lite　りすさんシリーズ | おつよん |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Fortnightly** |
| Size | 5 MB | 26 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kazuki Baba](https://appshunter.io/developer/903350438) | [HIROKI HORIGUCHI](https://appshunter.io/developer/1535451720) |

## What reviewers say

### 2級ボイラー技士問題集lite　りすさんシリーズ

[App page](https://appshunter.io/ios/app/2lite/id907765542)

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

**In-app purchases:** none


### おつよん

[App page](https://appshunter.io/ios/app/id6443517450)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 2級ボイラー技士問題集lite　りすさんシリーズ free?

2級ボイラー技士問題集lite　りすさんシリーズ is free to download, with no in-app purchases.

### Is おつよん free?

おつよん is free to download, with no in-app purchases.

### Do 2級ボイラー技士問題集lite　りすさんシリーズ or おつよん have ads?

おつよん shows ads; 2級ボイラー技士問題集lite　りすさんシリーズ does not.

### Which is updated more often, 2級ボイラー技士問題集lite　りすさんシリーズ or おつよん?

2級ボイラー技士問題集lite　りすさんシリーズ ships an update every 16 months, and おつよん fortnightly. Most recently, 2級ボイラー技士問題集lite　りすさんシリーズ was updated on October 8, 2026 and おつよん on October 5, 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.*