# 危険物乙４類取扱者試験問題集lite　りすさんシリーズ vs 2021年3級機械保全技能士学科過去問

The clearest difference is price: 危険物乙４類取扱者試験問題集lite　りすさんシリーズ at Free against 2021年3級機械保全技能士学科過去問's $1.99. 2021年3級機械保全技能士学科過去問's advantage is iOS requirement (15.0 vs 18.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

危険物乙４類取扱者試験問題集lite　りすさんシリーズ is free to download; 2021年3級機械保全技能士学科過去問 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

危険物乙４類取扱者試験問題集lite　りすさんシリーズ ships an update every 6 weeks, 2021年3級機械保全技能士学科過去問 monthly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | 危険物乙４類取扱者試験問題集lite　りすさんシリーズ | 2021年3級機械保全技能士学科過去問 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 6 MB | 7 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kazuki Baba](https://appshunter.io/developer/903350438) | [shinji ikeda](https://appshunter.io/developer/1615407188) |

## What reviewers say

### 危険物乙４類取扱者試験問題集lite　りすさんシリーズ

[App page](https://appshunter.io/ios/app/lite/id903638047)

This app provides practice questions and study materials for the hazardous materials handler exam. It offers科目-specific study, a question bank with detailed explanations, and progress tracking features. The app includes a glossary and textbook function for comprehensive learning.

**Highlights:** 科目別学習, 一問一答形式, 自動記憶・優先出題, 進捗状況バー, 本試験形式モード, 用語集, 教科書機能

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

**In-app purchases:** none


### 2021年3級機械保全技能士学科過去問

[App page](https://appshunter.io/ios/app/20213-1/id6477220893)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 危険物乙４類取扱者試験問題集lite　りすさんシリーズ free?

危険物乙４類取扱者試験問題集lite　りすさんシリーズ is free to download, with no in-app purchases.

### Is 2021年3級機械保全技能士学科過去問 free?

2021年3級機械保全技能士学科過去問 costs $1.99, with no in-app purchases.

### Do 危険物乙４類取扱者試験問題集lite　りすさんシリーズ or 2021年3級機械保全技能士学科過去問 have ads?

Neither 危険物乙４類取扱者試験問題集lite　りすさんシリーズ nor 2021年3級機械保全技能士学科過去問 shows ads.

### Which is updated more often, 危険物乙４類取扱者試験問題集lite　りすさんシリーズ or 2021年3級機械保全技能士学科過去問?

危険物乙４類取扱者試験問題集lite　りすさんシリーズ ships an update every 6 weeks, and 2021年3級機械保全技能士学科過去問 monthly. Most recently, 危険物乙４類取扱者試験問題集lite　りすさんシリーズ was updated on October 24, 2026 and 2021年3級機械保全技能士学科過去問 on October 22, 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.*