# Planet Gravity vs 星语

The clearest difference is review sentiment: 星语 at 100% against Planet Gravity's 44%. 星语 also leads on rating (5.0 vs 4.2) and in-app purchases (none vs 1). Planet Gravity's advantage is ratings volume (54 vs 1). On price and device support there is nothing between them.

Both are free to download. Planet Gravity sells 1 one-off in-app purchase. 星语 asks for nothing beyond the download.

星语 holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Planet Gravity has 54 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 44% of Planet Gravity's written reviews are positive against 100% of 星语's.

Planet Gravity ships an update every 6 months, 星语 every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Planet Gravity | 星语 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (54 ratings)](https://appshunter.io/ios/app/planet-gravity-simulateorbit/id1566504157/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1631699899/reviews)** |
| Number of ratings | **54** | 1 |
| Positive reviews | 44.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 129 MB | 213 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Tsang](https://appshunter.io/developer/416987065) | [雨恒 蔡](https://appshunter.io/developer/1556995910) |

## What reviewers say

### Planet Gravity

[App page](https://appshunter.io/ios/app/planet-gravity-simulateorbit/id1566504157)

Engage in a physics-based game simulating asteroid flight and solar system creation. Complete missions to explore the universe and pass the time. Discover other titles for freeform universe building.

**Highlights:** Physics-based gameplay, Asteroid simulation, Solar system creation, Level-based missions, Universe exploration

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Golden Pass | $2.99 | one-time |


### 星语

[App page](https://appshunter.io/ios/app/id1631699899)

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

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

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

### Is 星语 free?

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

### Which has better reviews, Planet Gravity or 星语?

星语 is rated higher. Planet Gravity averages 4.2 out of 5 from 54 ratings, while 星语 averages 5.0 from 1 ratings.

### Do Planet Gravity or 星语 have ads?

Planet Gravity shows ads; 星语 does not.

### Which is updated more often, Planet Gravity or 星语?

Planet Gravity ships an update every 6 months, and 星语 every 2 months. Most recently, Planet Gravity was updated on November 3, 2026 and 星语 on November 3, 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.*