# Physarum vs Auto Diary

The clearest difference is in-app purchases: Auto Diary at none against Physarum's 6. Auto Diary also leads on iOS requirement (13.0 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. Auto Diary asks for nothing beyond the download.

Physarum ships an update every 5 weeks, Auto Diary every 6 weeks. Both last shipped on October 15, 2026.

## The numbers

| Metric | Physarum | Auto Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/physarum-slime-mold/id6744574947/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 46 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) | [Heebok Lee](https://appshunter.io/developer/1855773499) |

## 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 |


### Auto Diary

[App page](https://appshunter.io/ios/app/auto-diary/id6762084066)

**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 Auto Diary free?

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

### Do Physarum or Auto Diary have ads?

Neither Physarum nor Auto Diary shows ads.

### Which is updated more often, Physarum or Auto Diary?

Physarum ships an update every 5 weeks, and Auto Diary every 6 weeks. Most recently, Physarum was updated on October 15, 2026 and Auto Diary 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.*