# 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 知ゼロ

The clearest difference is price: 知ゼロ at Free 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. 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 advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

知ゼロ is free to download; 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 up front. Neither carries in-app purchases, so what you see is what you pay.

## 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」 | 知ゼロ |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | — |
| Monetization | Paid | — |
| Size | 14 MB | 28 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ReCorrect Inc.](https://appshunter.io/developer/1141646408) | [TATSUYA TAGUCHI](https://appshunter.io/developer/1886335141) |

## 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


### 知ゼロ

[App page](https://appshunter.io/ios/app/id6771556923)

**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 知ゼロ free?

知ゼロ is free to download, 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 知ゼロ have ads?

知ゼロ shows ads; 危険物取扱者試験 乙種第4類(乙4)「30日合格プログラム」 does not.

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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.*