# 산안기 vs 떠먹

The clearest difference is in-app purchases: 떠먹 at none against 산안기's 3. 떠먹 also leads on ads (none vs shown). On price, update cadence, 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. 떠먹 asks for nothing beyond the download.

산안기 ships an update every 3 weeks, 떠먹 every 5 weeks. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 산안기 | 떠먹 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 80 MB | 46 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dasong sim](https://appshunter.io/developer/1883683802) | [HONG IK LEE](https://appshunter.io/developer/1819512861) |

## 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 |


### 떠먹

[App page](https://appshunter.io/ios/app/id6773045404)

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

**In-app purchases:** none


## Frequently asked questions

### Is 산안기 free?

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

### Is 떠먹 free?

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

### Do 산안기 or 떠먹 have ads?

산안기 shows ads; 떠먹 does not.

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

산안기 ships an update every 3 weeks, and 떠먹 every 5 weeks. Most recently, 산안기 was updated on October 2, 2026 and 떠먹 on October 3, 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.*