# 자연과학OX vs 탐타

The clearest difference is in-app purchases: 탐타 at none against 자연과학OX's 3. 탐타 also leads on update cadence (every 4 days vs every 4 months). 자연과학OX's advantage is review sentiment (100% vs 80%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 자연과학OX sells 3 in-app purchases, starting at $2.99 per month. 탐타 asks for nothing beyond the download.

자연과학OX ships an update every 4 months, 탐타 every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 자연과학OX | 탐타 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Freemium | **Free** |
| Size | 26 MB | 76 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHAE HYUCK LEE](https://appshunter.io/developer/1658701307) | [NSER Inc.](https://appshunter.io/developer/1852419476) |

## What reviewers say

### 자연과학OX

[App page](https://appshunter.io/ios/app/ox/id6479007396)

This app offers practice quizzes for recent natural science topics, covering physics, chemistry, biology, and earth science. It provides subscription options for enhanced learning features and detailed explanations.

**Highlights:** Physics quizzes, Chemistry quizzes, Biology quizzes, Earth science quizzes, Subscription for explanations, Practice quizzes

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 단원 설정권 | $2.99 | per month |
| 무제한 해설권 | $3.99 | per month |
| 평생 자유 이용권 | $19.99 | one-time |


### 탐타

[App page](https://appshunter.io/ios/app/and-ai/id6752917237)

This app uses AI to analyze your performance on past exam questions for Korean college entrance exams. It provides personalized problem recommendations and predicts your expected grades and scores, helping you focus on areas needing improvement.

**Highlights:** AI-driven score prediction, Real-time grade cutoffs, Personalized problem recommendations, Growth reports, Comprehensive subject coverage (Social Studies, Science, Korean History), 1-minute study sessions, Intuitive UI

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

**In-app purchases:** none


## Frequently asked questions

### Is 자연과학OX free?

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

### Is 탐타 free?

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

### Do 자연과학OX or 탐타 have ads?

Neither 자연과학OX nor 탐타 shows ads.

### Which is updated more often, 자연과학OX or 탐타?

자연과학OX ships an update every 4 months, and 탐타 every 4 days. Most recently, 자연과학OX was updated on October 24, 2026 and 탐타 on October 24, 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.*