# 산안기 vs Cloud Security Engineer Prep

The clearest difference is ads: Cloud Security Engineer Prep at none against 산안기's shown. Cloud Security Engineer Prep also leads on update cadence (every 9 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 산안기 sells 3 in-app purchases, starting at $1.99 per month and Cloud Security Engineer Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

산안기 ships an update every 3 weeks, Cloud Security Engineer Prep every 9 days. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 산안기 | Cloud Security Engineer Prep |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 91 MB | 118 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dasong sim](https://appshunter.io/developer/1883683802) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### 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 |


### Cloud Security Engineer Prep

[App page](https://appshunter.io/ios/app/cloud-security-engineer-prep/id6785744151)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is 산안기 free?

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

### Is Cloud Security Engineer Prep free?

Cloud Security Engineer Prep is free to download, with in-app purchases available.

### Do 산안기 or Cloud Security Engineer Prep have ads?

산안기 shows ads; Cloud Security Engineer Prep does not.

### Which is updated more often, 산안기 or Cloud Security Engineer Prep?

산안기 ships an update every 3 weeks, and Cloud Security Engineer Prep every 9 days. Most recently, 산안기 was updated on October 18, 2026 and Cloud Security Engineer Prep on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*