# ボイラー整備士問題集　りすさんシリーズ vs 2sidePLL

The clearest difference is price: 2sidePLL at Free against ボイラー整備士問題集　りすさんシリーズ's $2.99. 2sidePLL also leads on update cadence (every 4 days vs every 22 months) and iOS requirement (15.6 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

2sidePLL is free to download; ボイラー整備士問題集　りすさんシリーズ costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ボイラー整備士問題集　りすさんシリーズ ships an update every 22 months, 2sidePLL every 4 days. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ボイラー整備士問題集　りすさんシリーズ | 2sidePLL |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 4 days** |
| Size | 8 MB | 143 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuki Baba](https://appshunter.io/developer/903350438) | [Yuya Yoshida](https://appshunter.io/developer/1823829175) |

## What reviewers say

### ボイラー整備士問題集　りすさんシリーズ

[App page](https://appshunter.io/ios/app/id1114494983)

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

**In-app purchases:** none


### 2sidePLL

[App page](https://appshunter.io/ios/app/2sidepll/id6747999697)

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

**In-app purchases:** none


## Frequently asked questions

### Is ボイラー整備士問題集　りすさんシリーズ free?

ボイラー整備士問題集　りすさんシリーズ costs $2.99, with no in-app purchases.

### Is 2sidePLL free?

2sidePLL is free to download, with no in-app purchases.

### Do ボイラー整備士問題集　りすさんシリーズ or 2sidePLL have ads?

Neither ボイラー整備士問題集　りすさんシリーズ nor 2sidePLL shows ads.

### Which is updated more often, ボイラー整備士問題集　りすさんシリーズ or 2sidePLL?

ボイラー整備士問題集　りすさんシリーズ ships an update every 22 months, and 2sidePLL every 4 days. Most recently, ボイラー整備士問題集　りすさんシリーズ was updated on September 23, 2026 and 2sidePLL on September 19, 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.*