# Rat Zone vs Fieldmark

The clearest difference is update cadence: Fieldmark at every 3 weeks against Rat Zone's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rat Zone ships an update every 8 months, Fieldmark every 3 weeks. The most recent releases landed on September 24, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Rat Zone | Fieldmark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (19 ratings)](https://appshunter.io/ios/app/rat-zone/id1449538595/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 123 MB | 30 MB |
| Requires iOS | **14.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [arludo Pty Ltd](https://appshunter.io/developer/1023251086) | [FAIMS Project](https://appshunter.io/developer/1592632374) |

## What reviewers say

### Rat Zone

[App page](https://appshunter.io/ios/app/rat-zone/id1449538595)

Experience a virtual conditioning experiment with your own digital rat. Explore Pavlovian and instrumental conditioning concepts, and see how your rat's behavior changes with treats and augmented reality interactions.

**Highlights:** Virtual rat conditioning experiments, Pavlovian conditioning concepts, Instrumental conditioning concepts, Augmented Reality mode, Behavioral observation, Interactive treat feeding

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

**In-app purchases:** none


### Fieldmark

[App page](https://appshunter.io/ios/app/fieldmark/id1592632372)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rat Zone free?

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

### Is Fieldmark free?

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

### Do Rat Zone or Fieldmark have ads?

Neither Rat Zone nor Fieldmark shows ads.

### Which is updated more often, Rat Zone or Fieldmark?

Rat Zone ships an update every 8 months, and Fieldmark every 3 weeks. Most recently, Rat Zone was updated on September 24, 2026 and Fieldmark on September 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*