# 자연과학OX vs The Relativity Tales

The clearest difference is ads: 자연과학OX at none against The Relativity Tales's shown. The Relativity Tales's advantage is update cadence (every 10 days vs every 4 months). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. 자연과학OX sells 3 in-app purchases, starting at $2.99 per month and The Relativity Tales sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

자연과학OX ships an update every 4 months, The Relativity Tales every 10 days. The most recent releases landed on November 4, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | 자연과학OX | The Relativity Tales |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/the-relativity-tales/id6747155057/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 26 MB | 619 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [CHAE HYUCK LEE](https://appshunter.io/developer/1658701307) | [Sang Heon Park](https://appshunter.io/developer/1675276100) |

## 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 |


### The Relativity Tales

[App page](https://appshunter.io/ios/app/the-relativity-tales/id6747155057)

Explore the principles of special relativity through interactive thought experiments and engaging narratives. This app transforms complex scientific concepts into intuitive experiences, making science accessible and emotionally resonant.

**Highlights:** Interactive thought experiments, Narrative-driven learning, Intuitive science exploration, Exploration of spacetime concepts, Courtroom thriller scenarios, Space exploration narratives

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock "The Relativity Tales" | $4.99 | one-time |


## Frequently asked questions

### Is 자연과학OX free?

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

### Is The Relativity Tales free?

The Relativity Tales is free to download, with in-app purchases available.

### Do 자연과학OX or The Relativity Tales have ads?

The Relativity Tales shows ads; 자연과학OX does not.

### Which is updated more often, 자연과학OX or The Relativity Tales?

자연과학OX ships an update every 4 months, and The Relativity Tales every 10 days. Most recently, 자연과학OX was updated on November 4, 2026 and The Relativity Tales on November 12, 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.*