# 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 vs 自主保全士 単語帳 1級/2級

The clearest difference is price: 自主保全士 単語帳 1級/2級 at $1.99 against 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」's $9.99. 自主保全士 単語帳 1級/2級 also leads on update cadence (every 3 days vs every 12 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 costs $9.99 and 自主保全士 単語帳 1級/2級 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 ships an update every 12 months, 自主保全士 単語帳 1級/2級 every 3 days. Both last shipped on October 8, 2026.

## The numbers

| Metric | 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 | 自主保全士 単語帳 1級/2級 |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 22 MB | 26 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ReCorrect Inc.](https://appshunter.io/developer/1141646408) | [株式会社キイロ乃カモ](https://appshunter.io/developer/1796537168) |

## What reviewers say

### 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」

[App page](https://appshunter.io/ios/app/4430/id1439527297)

This app helps users prepare for the Class B, Type 4 hazardous materials handler exam. It offers a structured learning schedule, randomized mock exams, and targeted practice for weak subjects, aiming for efficient study and a high chance of passing.

**Highlights:** Structured learning schedule, Randomized mock exams, Targeted practice for weak subjects, Analysis of past questions, Study plan for efficient learning

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

**In-app purchases:** none


### 自主保全士 単語帳 1級/2級

[App page](https://appshunter.io/ios/app/12/id6468481523)

This app serves as a vocabulary builder for the Jishu Hozen Shi certification exam (levels 1 and 2). It offers an ad-free, offline study experience with key terms and a quiz mode to test comprehension. It is updated to the latest official text.

**Highlights:** Ad-free experience, Offline study capability, Key vocabulary for certification, Quiz mode for comprehension check, Updated to latest official text

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

**In-app purchases:** none


## Frequently asked questions

### Is 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 free?

危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 costs $9.99, with no in-app purchases.

### Is 自主保全士 単語帳 1級/2級 free?

自主保全士 単語帳 1級/2級 costs $1.99, with no in-app purchases.

### Do 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 or 自主保全士 単語帳 1級/2級 have ads?

Neither 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 nor 自主保全士 単語帳 1級/2級 shows ads.

### Which is updated more often, 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 or 自主保全士 単語帳 1級/2級?

危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 ships an update every 12 months, and 自主保全士 単語帳 1級/2級 every 3 days. Most recently, 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 was updated on October 8, 2026 and 自主保全士 単語帳 1級/2級 on October 8, 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.*