# Gravity! vs Relativistic

The clearest difference is rating: Relativistic at 5.0 against Gravity!'s 3.9. Relativistic also leads on in-app purchases (none vs 1) and iOS requirement (9.0 vs 15.6). Gravity!'s advantage is ratings volume (18 vs 2). On price, ads and device support there is nothing between them.

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

Relativistic holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Gravity! has 18 ratings behind it against 2, so its average is the more settled of the two.

## The numbers

| Metric | Gravity! | Relativistic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/relativistic/id1018548002/reviews)** |
| Number of ratings | **18** | 2 |
| Positive reviews | 73.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 7 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marc Davis](https://appshunter.io/developer/1010892850) | [Christopher Leet](https://appshunter.io/developer/1018548001) |

## 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 |


### Relativistic

[App page](https://appshunter.io/ios/app/relativistic/id1018548002)

Explore the effects of relativity by adjusting the speed of light and observing real-time changes. Simulate scenarios like time dilation and gravitational blueshift by placing observers and celestial objects on a map. This app offers an intuitive method for understanding Einstein's theory.

**Highlights:** Adjustable speed of light, Real-time relativity effects, Observer placement and time dilation, Black hole simulation, Gravitational blueshift visualization, Intuitive learning tool

**In-app purchases:** none


## Frequently asked questions

### Is Gravity! free?

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

### Is Relativistic free?

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

### Which has better reviews, Gravity! or Relativistic?

Relativistic is rated higher. Gravity! averages 3.9 out of 5 from 18 ratings, while Relativistic averages 5.0 from 2 ratings.

### Do Gravity! or Relativistic have ads?

Neither Gravity! nor Relativistic shows ads.

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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.*