# 科学星球 vs Sapling Isle

The clearest difference is in-app purchases: Sapling Isle at none against 科学星球's 15. 科学星球's advantage is iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 科学星球 sells 15 one-off in-app purchases. Sapling Isle asks for nothing beyond the download.

科学星球 ships an update every 3 weeks, Sapling Isle fortnightly. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 科学星球 | Sapling Isle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 436 MB | 40 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [深圳市悦道科技有限公司](https://appshunter.io/developer/1571066605) | [大鹏 张](https://appshunter.io/developer/937718061) |

## What reviewers say

### 科学星球

[App page](https://appshunter.io/ios/app/id1638447872)

**Features:** macOS Compatibility

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 科学星球vip包月 | $7.99 | one-time |
| 科学星球包月VIP大会员 | $7.99 | one-time |
| 科学星球购买单课+vip包月 | $11.99 | one-time |
| 科学星球vip包季 | $12.99 | one-time |
| 科学星球购买单课+vip包季 | $17.99 | one-time |
| 科学星球包季VIP大会员 | $17.99 | one-time |
| 科学星球vip包年 | $29.99 | one-time |
| 科学星球购买单课+vip包年 | $33.99 | one-time |
| 科学星球包年VIP大会员 | $34.99 | one-time |
| 科学星球一年vip | $37.99 | one-time |
| 科学星球会员组合包 | $39.99 | one-time |
| 科学星球一年vip | $46.99 | one-time |
| 科学星球两年vip | $64.99 | one-time |
| 科学星球五年vip | $119.99 | one-time |
| 科学星球5年VIP大会员 | $129.99 | one-time |


### Sapling Isle

[App page](https://appshunter.io/ios/app/sapling-isle-physics-lab/id6792211746)

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

**In-app purchases:** none


## Frequently asked questions

### Is 科学星球 free?

科学星球 is free to download, with in-app purchases available.

### Is Sapling Isle free?

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

### Do 科学星球 or Sapling Isle have ads?

Neither 科学星球 nor Sapling Isle shows ads.

### Which is updated more often, 科学星球 or Sapling Isle?

科学星球 ships an update every 3 weeks, and Sapling Isle fortnightly. Most recently, 科学星球 was updated on September 19, 2026 and Sapling Isle on September 10, 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.*