# Fermentation Lab vs Crumb

The clearest difference is in-app purchases: Fermentation Lab at none against Crumb's 2. Fermentation Lab also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Crumb sells 2 in-app purchases, starting at $4.99 per 7 days. Fermentation Lab asks for nothing beyond the download.

Fermentation Lab ships an update every 5 weeks, Crumb monthly. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Fermentation Lab | Crumb |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 91 MB | 25 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Lice](https://appshunter.io/developer/1888002310) | [Vadim Semenko](https://appshunter.io/developer/1539136864) |

## What reviewers say

### Fermentation Lab

[App page](https://appshunter.io/ios/app/fermentation-lab/id6761143434)

**Features:** macOS Compatibility

**In-app purchases:** none


### Crumb

[App page](https://appshunter.io/ios/app/crumb-sourdough-tracker/id6777510093)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sourdough Pro Weekly | $4.99 | per 7 days |
| Sourdough Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Fermentation Lab free?

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

### Is Crumb free?

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

### Do Fermentation Lab or Crumb have ads?

Neither Fermentation Lab nor Crumb shows ads.

### Which is updated more often, Fermentation Lab or Crumb?

Fermentation Lab ships an update every 5 weeks, and Crumb monthly. Most recently, Fermentation Lab was updated on September 23, 2026 and Crumb on September 20, 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.*