# Physarum vs GravyLensing

The clearest difference is in-app purchases: GravyLensing at none against Physarum's 6. GravyLensing also leads on iOS requirement (16.4 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Physarum sells 3 one-off in-app purchases. GravyLensing asks for nothing beyond the download.

Physarum ships an update every 5 weeks, GravyLensing every 2 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Physarum | GravyLensing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (32 ratings)](https://appshunter.io/ios/app/physarum-slime-mold/id6744574947/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 7 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) | [WILLIAM JOSEPH ROPER](https://appshunter.io/developer/6783065797) |

## What reviewers say

### 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 |


### GravyLensing

[App page](https://appshunter.io/ios/app/gravylensing/id6783065795)

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

**In-app purchases:** none


## Frequently asked questions

### Is Physarum free?

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

### Is GravyLensing free?

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

### Do Physarum or GravyLensing have ads?

Neither Physarum nor GravyLensing shows ads.

### Which is updated more often, Physarum or GravyLensing?

Physarum ships an update every 5 weeks, and GravyLensing every 2 months. Most recently, Physarum was updated on October 24, 2026 and GravyLensing on October 14, 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.*