# Gravity! vs Physarum

The clearest difference is rating: Physarum at 4.8 against Gravity!'s 3.9. Physarum also leads on review sentiment (100% vs 74%). Gravity!'s advantage is iOS requirement (15.6 vs 26.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

Physarum holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 18 and 27 respectively. Written reviews point the same way: 74% of Gravity!'s written reviews are positive against 100% of Physarum's.

Gravity! ships an update every 2 months, Physarum every 5 weeks. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Gravity! | Physarum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (18 ratings)](https://appshunter.io/ios/app/gravity/id738871919/reviews) | **[4.8 (27 ratings)](https://appshunter.io/ios/app/physarum-slime-mold/id6744574947/reviews)** |
| Number of ratings | 18 | **27** |
| Positive reviews | 73.5% of reviews | **100.0% 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 |


### Physarum

[App page](https://appshunter.io/ios/app/physarum-slime-mold/id6744574947)

Explore the fascinating emergent behavior of slime molds through a visually rich simulation. Adjust agent parameters, influence growth with intuitive controls, and discover complex, mesmerizing patterns.

**Highlights:** Slime mold behavior simulation, Autonomous agent control, Adjustable agent parameters, Maze solving and network formation, Vibrant color modes, Interactive system manipulation

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small developer tip | $1.99 | one-time |
| Medium developer tip | $3.99 | one-time |
| Big developer tip | $5.99 | one-time |


## Frequently asked questions

### Is Gravity! free?

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

### Is Physarum free?

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

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

Physarum is rated higher. Gravity! averages 3.9 out of 5 from 18 ratings, while Physarum averages 4.8 from 27 ratings.

### Do Gravity! or Physarum have ads?

Neither Gravity! nor Physarum shows ads.

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

Gravity! ships an update every 2 months, and Physarum every 5 weeks. Most recently, Gravity! was updated on October 12, 2026 and Physarum on October 15, 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.*