# Planet simulation vs Gravity

The clearest difference is in-app purchases: Planet simulation at none against Gravity's 1. Planet simulation also leads on iOS requirement (13.0 vs 15.0). Gravity's advantage is update cadence (every 2 months vs every 8 months). On price, ads and device support there is nothing between them.

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

Planet simulation ships an update every 8 months, Gravity every 2 months. The most recent releases landed on October 9, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Planet simulation | Gravity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (165 ratings)](https://appshunter.io/ios/app/planet-simulation/id356146219/reviews)** | — |
| Number of ratings | **165** | — |
| Positive reviews | 74.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 15 MB | 116 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DAN-BALL](https://appshunter.io/developer/348592290) | [Quang Thang To](https://appshunter.io/developer/1817626562) |

## What reviewers say

### Planet simulation

[App page](https://appshunter.io/ios/app/planet-simulation/id356146219)

Design and build your own solar system with various stars. Explore the fascinating world of gravity and recreate celestial bodies. A relaxing game for your spare time.

**Highlights:** Create your own solar system, Simulate gravity, Design with various stars, Reproduce celestial bodies, Relaxing gameplay

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Realistic gravity simulation
- 👍 Fun to mess around with
- 🎨 Visually appealing
- 🤖 Good for learning about planetary motion

**What reviewers complain about**

- 🐛 Planets often crash into the sun
- 🔍 Limited features and customization options
- 📢 Distracting ads
- 🤯 Confusing controls and UI

**Reported bugs**

- Planets sometimes disappear or behave erratically
- App crashes or freezes occasionally
- Scaling and scrolling issues

**Requested features**

- Add more celestial objects (black holes, supernovas, etc.)
- Allow for more complex orbits and binary systems
- Implement a save/load feature for solar systems
- Add a tutorial or help section
- Integrate with educational resources on astronomy


### Gravity

[App page](https://appshunter.io/ios/app/gravity-planets-in-universe/id6746643773)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Creative Mode | $2.99 | one-time |


## Frequently asked questions

### Is Planet simulation free?

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

### Is Gravity free?

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

### Do Planet simulation or Gravity have ads?

Both Planet simulation and Gravity show ads.

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

Planet simulation ships an update every 8 months, and Gravity every 2 months. Most recently, Planet simulation was updated on October 9, 2026 and Gravity on October 19, 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.*