# Gravity! vs Quantum

The clearest difference is rating: Quantum at 4.8 against Gravity!'s 3.9. Quantum also leads on review sentiment (86% vs 74%) and ratings volume (133 vs 18). Gravity!'s advantage is iOS requirement (15.6 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Gravity! sells 1 one-off in-app purchase and Quantum sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Quantum holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Quantum has 133 ratings behind it against 18, 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 86% of Quantum's.

Gravity! ships an update every 2 months, Quantum every 5 weeks. The most recent releases landed on August 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Gravity! | Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews) | **[4.8 (133 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews)** |
| Number of ratings | 18 | **133** |
| Positive reviews | 73.5% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 32 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Marc Davis](https://appshunter.io/developer/1010892850) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## 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 |


### Quantum

[App page](https://appshunter.io/ios/app/quantum-particle-life/id6504465371)

Explore the hidden world of particles with a real-time simulator. Model up to 10,000 particles and experiment with natural phenomena like crystallization and orbital mechanics. Customize interactions and visualize results dynamically.

**Highlights:** Real-time particle simulation, Model up to 10,000 particles, Simulate natural phenomena, Four distinct particle classes, Customizable rules editor, Dynamic visualizations, Interactive control

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer tip | $1.99 | one-time |
| Developer tip | $3.99 | one-time |
| Developer tip | $5.99 | one-time |


## Frequently asked questions

### Is Gravity! free?

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

### Is Quantum free?

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

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

Quantum is rated higher. Gravity! averages 3.9 out of 5 from 18 ratings, while Quantum averages 4.8 from 133 ratings.

### Do Gravity! or Quantum have ads?

Neither Gravity! nor Quantum shows ads.

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

Gravity! ships an update every 2 months, and Quantum every 5 weeks. Most recently, Gravity! was updated on August 6, 2026 and Quantum on September 23, 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.*