# 四维世界：空间探索 vs 妙懂化学

The clearest difference is in-app purchases: 四维世界：空间探索 at none against 妙懂化学's 3. 妙懂化学's advantage is iOS requirement (14.0 vs 16.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. 妙懂化学 sells 3 one-off in-app purchases. 四维世界：空间探索 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 四维世界：空间探索 against 5.0 for 妙懂化学. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

四维世界：空间探索 ships an update every 5 days, 妙懂化学 every 4 days. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 四维世界：空间探索 | 妙懂化学 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id6787638663/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/ar/id6803856365/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 559 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [越 王](https://appshunter.io/developer/6787476168) | [四川寰视乾坤科技有限公司](https://appshunter.io/developer/1168959978) |

## What reviewers say

### 四维世界：空间探索

[App page](https://appshunter.io/ios/app/id6787638663)

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

**In-app purchases:** none


### 妙懂化学

[App page](https://appshunter.io/ios/app/ar/id6803856365)

This educational app uses AR, interactive maps, and 3D models to make learning chemistry engaging for elementary and middle school students. It features virtual experiments, a comprehensive element encyclopedia, and gamified learning modules.

**Highlights:** AR-enhanced chemical reactions, Interactive element and knowledge maps, Virtual chemistry experiments, 3D molecular models, Gamified learning modules, Comprehensive element encyclopedia, Equation database

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6个月会员 | $24.99 | one-time |
| 12个月会员 | $39.99 | one-time |
| 永久会员 | $69.99 | one-time |


## Frequently asked questions

### Is 四维世界：空间探索 free?

四维世界：空间探索 is free to download, with no in-app purchases.

### Is 妙懂化学 free?

妙懂化学 is free to download, with in-app purchases available.

### Which has better reviews, 四维世界：空间探索 or 妙懂化学?

四维世界：空间探索 and 妙懂化学 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 四维世界：空间探索 or 妙懂化学 have ads?

Neither 四维世界：空间探索 nor 妙懂化学 shows ads.

### Which is updated more often, 四维世界：空间探索 or 妙懂化学?

四维世界：空间探索 ships an update every 5 days, and 妙懂化学 every 4 days. Most recently, 四维世界：空间探索 was updated on October 12, 2026 and 妙懂化学 on October 13, 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.*