# Gravity! vs 3

The clearest difference is rating: 3 at 5.0 against Gravity!'s 3.9. 3 also leads on in-app purchases (none vs 1) and review sentiment (100% vs 74%). Gravity!'s advantage is ratings volume (18 vs 3). 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. 3 asks for nothing beyond the download.

3 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 3, so its average is the more settled of the two. Written reviews point the same way: 74% of Gravity!'s written reviews are positive against 100% of 3's.

Gravity! ships an update every 2 months, 3 monthly. The most recent releases landed on August 6, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Gravity! | 3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/3-body/id6642661687/reviews)** |
| Number of ratings | **18** | 3 |
| Positive reviews | 73.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 9 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marc Davis](https://appshunter.io/developer/1010892850) | [Cubic Insights LLC](https://appshunter.io/developer/1763432190) |

## 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 |


### 3

[App page](https://appshunter.io/ios/app/3-body/id6642661687)

Explore the wonders of gravity with this 2D N-body simulator. Experiment with celestial mechanics, create mesmerizing patterns, and customize your simulations. It's a fun and educational playground for anyone curious about physics.

**Highlights:** Simulate gravity interactions, Explore preset configurations, Customize body size, color, and trails, Educational and fun physics experiments, Create mesmerizing visual patterns

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

**In-app purchases:** none


## Frequently asked questions

### Is Gravity! free?

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

### Is 3 free?

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

### Which has better reviews, Gravity! or 3?

3 is rated higher. Gravity! averages 3.9 out of 5 from 18 ratings, while 3 averages 5.0 from 3 ratings.

### Do Gravity! or 3 have ads?

Neither Gravity! nor 3 shows ads.

### Which is updated more often, Gravity! or 3?

Gravity! ships an update every 2 months, and 3 monthly. Most recently, Gravity! was updated on August 6, 2026 and 3 on September 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.*