# DR.Orbit vs Gravity!

The clearest difference is review sentiment: Gravity! at 74% against DR.Orbit's 0%. Gravity! also leads on rating (3.9 vs 2.0) and ratings volume (18 vs 1). DR.Orbit's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 2 months). On price and ads there is nothing between them.

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

Gravity! holds the better App Store score, 3.9 against 2.0. That said, the two scores are not equally well evidenced: Gravity! has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of DR.Orbit's written reviews are positive against 74% of Gravity!'s.

DR.Orbit ships an update weekly, Gravity! every 2 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | DR.Orbit | Gravity! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/drorbit/id697764304/reviews) | **[3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews)** |
| Number of ratings | 1 | **18** |
| Positive reviews | 0.0% of reviews | **73.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 17 MB |
| Requires iOS | **9.1** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Roth](https://appshunter.io/developer/356650850) | [Marc Davis](https://appshunter.io/developer/1010892850) |

## What reviewers say

### DR.Orbit

[App page](https://appshunter.io/ios/app/drorbit/id697764304)

Explore orbital mechanics by simulating how masses orbit a central gravitational pull. Use your finger to guide a mass into a stable orbit, with options for visual effects and device-based control.

**Highlights:** Simulate orbital mechanics, Guide masses into stable orbits, Adjust trajectory with finger input, Introduce simulated drag, Enable visual enhancements, Control movement via device tilt

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is DR.Orbit free?

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

### Is Gravity! free?

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

### Which has better reviews, DR.Orbit or Gravity!?

Gravity! is rated higher. DR.Orbit averages 2.0 out of 5 from 1 ratings, while Gravity! averages 3.9 from 18 ratings.

### Do DR.Orbit or Gravity! have ads?

Neither DR.Orbit nor Gravity! shows ads.

### Which is updated more often, DR.Orbit or Gravity!?

DR.Orbit ships an update weekly, and Gravity! every 2 months. Most recently, DR.Orbit was updated on October 7, 2026 and Gravity! on October 7, 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.*