# Rokids, 로키즈 vs 산안기

The clearest difference is in-app purchases: Rokids, 로키즈 at none against 산안기's 3. Rokids, 로키즈 also leads on ads (none vs shown) and iOS requirement (12.4 vs 15.1). 산안기's advantage is update cadence (every 3 weeks vs every 5 months). On price 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. Rokids, 로키즈 asks for nothing beyond the download.

Rokids, 로키즈 ships an update every 5 months, 산안기 every 3 weeks. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Rokids, 로키즈 | 산안기 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 45 MB | 91 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Life &Science Co.,Ltd.](https://appshunter.io/developer/1121866034) | [dasong sim](https://appshunter.io/developer/1883683802) |

## What reviewers say

### Rokids, 로키즈

[App page](https://appshunter.io/ios/app/rokids/id1130236254)

**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 Rokids, 로키즈 free?

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

### Is 산안기 free?

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

### Do Rokids, 로키즈 or 산안기 have ads?

산안기 shows ads; Rokids, 로키즈 does not.

### Which is updated more often, Rokids, 로키즈 or 산안기?

Rokids, 로키즈 ships an update every 5 months, and 산안기 every 3 weeks. Most recently, Rokids, 로키즈 was updated on November 11, 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.*