# Rot & Ferment vs AI Training Simulator

The clearest difference is update cadence: AI Training Simulator at every 2 days against Rot & Ferment's every 4 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Rot & Ferment sells 5 one-off in-app purchases and AI Training Simulator sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Rot & Ferment ships an update every 4 days, AI Training Simulator every 2 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Rot & Ferment | AI Training Simulator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 457 MB | 69 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Nils Rohwer](https://appshunter.io/developer/6777538815) | [Yi Hong Lim](https://appshunter.io/developer/6804400495) |

## What reviewers say

### Rot & Ferment

[App page](https://appshunter.io/ios/app/rot-and-ferment/id6800438731)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time skip | $0.99 | one-time |
| Hire a trusted carter | $0.99 | one-time |
| Buy a crock | $1.99 | one-time |
| Remove ads | $2.99 | one-time |
| Permanent x2 income | $4.99 | one-time |


### AI Training Simulator

[App page](https://appshunter.io/ios/app/ai-training-simulator/id6804400493)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Gems Pack | $0.99 | one-time |
| Remove Ads | $3.99 | one-time |
| Small Package | $3.99 | one-time |
| Medium Gems Pack | $4.99 | one-time |
| Starter Package | $6.99 | one-time |
| Medium Package | $9.99 | one-time |
| Large Gems Pack | $9.99 | one-time |
| Large Package | $19.99 | one-time |
| Colossal Gems Pack | $19.99 | one-time |


## Frequently asked questions

### Is Rot & Ferment free?

Rot & Ferment is free to download, with in-app purchases available.

### Is AI Training Simulator free?

AI Training Simulator is free to download, with in-app purchases available.

### Do Rot & Ferment or AI Training Simulator have ads?

Both Rot & Ferment and AI Training Simulator show ads.

### Which is updated more often, Rot & Ferment or AI Training Simulator?

Rot & Ferment ships an update every 4 days, and AI Training Simulator every 2 days. Most recently, Rot & Ferment was updated on October 21, 2026 and AI Training Simulator on October 24, 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.*