# 산업안전산업기사 vs 산안기

The clearest difference is review sentiment: 산업안전산업기사 at 100% against 산안기's 0%. 산업안전산업기사 also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 15.1). 산안기's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. 산안기 sells 3 in-app purchases, starting at $1.99 per month. 산업안전산업기사 asks for nothing beyond the download.

산업안전산업기사 ships an update every 3 months, 산안기 every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 산업안전산업기사 | 산안기 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 244 MB | 91 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jongmin Kim](https://appshunter.io/developer/1693759760) | [dasong sim](https://appshunter.io/developer/1883683802) |

## What reviewers say

### 산업안전산업기사

[App page](https://appshunter.io/ios/app/id6741509717)

Prepare for the Industrial Safety Engineer certification exam with this comprehensive app. It offers practice tests, audio playback of questions, detailed explanations, and a learning notebook. Study offline anytime, anywhere.

**Highlights:** 15 sets of latest practice questions, Yearly and subject-based question sets, Audio playback for questions, Randomized question mode, Detailed explanations for all questions, Learning notebook and audio lectures, Automatic saving of incorrect answers, Favorite questions for review

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

**In-app purchases:** none


### 산안기

[App page](https://appshunter.io/ios/app/id6765879972)

This app focuses on effective review and understanding of concepts for the Industrial Safety Engineer exam. It uses an AI-powered algorithm to schedule personalized reviews, identifies your weaknesses, and provides detailed explanations and practice tests. Study efficiently even with limited time.

**Highlights:** AI-powered spaced repetition for optimal review, Concept-based learning with detailed explanations, Personalized weakness analysis and targeted practice, Full-range practice tests simulating the actual exam, Built-in scientific calculator, Offline study support, Progress tracking and study reports

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 프리미엄 월간 | $1.99 | per month |
| 프리미엄 3개월 | $3.99 | per 3 months |
| 프리미엄 평생 | $5.99 | one-time |


## Frequently asked questions

### Is 산업안전산업기사 free?

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

### Is 산안기 free?

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

### Do 산업안전산업기사 or 산안기 have ads?

Both 산업안전산업기사 and 산안기 show ads.

### Which is updated more often, 산업안전산업기사 or 산안기?

산업안전산업기사 ships an update every 3 months, and 산안기 every 3 weeks. Most recently, 산업안전산업기사 was updated on October 30, 2026 and 산안기 on October 31, 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.*