# 산업안전기사 vs 일반기계기사

The clearest difference is update cadence: 산업안전기사 at every 8 days against 일반기계기사's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 산업안전기사 sells 1 one-off in-app purchase and 일반기계기사 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

산업안전기사 ships an update every 8 days, 일반기계기사 every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | 산업안전기사 | 일반기계기사 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 8 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 226 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Qingdao Tomato Creative Technology Service Co., Ltd](https://appshunter.io/developer/1760477498) | [Jongmin Kim](https://appshunter.io/developer/1693759760) |

## What reviewers say

### 산업안전기사

[App page](https://appshunter.io/ios/app/cbt/id6741500736)

This app provides extensive past exam questions and detailed explanations to help users prepare for the Industrial Safety Engineer certification. It features intelligent error management, personalized favorites, and offline access for flexible learning. All core learning materials are available for free.

**Highlights:** 10 years of past exam questions, Scientific problem-solving by type, Detailed problem explanations, Intelligent incorrect answer management, Personalized favorites feature, Offline learning support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고 제거 | $3.99 | one-time |


### 일반기계기사

[App page](https://appshunter.io/ios/app/id6742698082)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고 제거 | $2.99 | one-time |
| 후원하기 | $2.99 | one-time |


## Frequently asked questions

### Is 산업안전기사 free?

산업안전기사 is free to download, with in-app purchases available.

### Is 일반기계기사 free?

일반기계기사 is free to download, with in-app purchases available.

### Do 산업안전기사 or 일반기계기사 have ads?

Both 산업안전기사 and 일반기계기사 show ads.

### Which is updated more often, 산업안전기사 or 일반기계기사?

산업안전기사 ships an update every 8 days, and 일반기계기사 every 2 months. Most recently, 산업안전기사 was updated on October 30, 2026 and 일반기계기사 on October 30, 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.*