# Gravity! vs Graviton Sim

The clearest difference is in-app purchases: Graviton Sim at none against Gravity!'s 1. Graviton Sim also leads on update cadence (every 9 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Gravity! ships an update every 2 months, Graviton Sim every 9 days. The most recent releases landed on August 6, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Gravity! | Graviton Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 73.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 63 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Marc Davis](https://appshunter.io/developer/1010892850) | [Scott Carnett](https://appshunter.io/developer/1550322381) |

## What reviewers say

### Gravity!

[App page](https://appshunter.io/ios/app/gravity/id738871919)

Simulate the forces of gravity by flinging particles and observing their interactions. Create celestial bodies like planets and black holes, and customize their properties. Explore vast cosmic simulations with intuitive zoom and pan controls.

**Highlights:** Gravity simulation, Particle interaction, Create solar systems, Add black holes, Adjust particle properties, Zoom and pan controls

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gravity! Extended Edition | $0.99 | one-time |


### Graviton Sim

[App page](https://appshunter.io/ios/app/graviton-sim/id6754208416)

**In-app purchases:** none


## Frequently asked questions

### Is Gravity! free?

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

### Is Graviton Sim free?

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

### Do Gravity! or Graviton Sim have ads?

Neither Gravity! nor Graviton Sim shows ads.

### Which is updated more often, Gravity! or Graviton Sim?

Gravity! ships an update every 2 months, and Graviton Sim every 9 days. Most recently, Gravity! was updated on August 6, 2026 and Graviton Sim on September 18, 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.*