# Fermento vs Kombucha Keeper

The clearest difference is in-app purchases: Kombucha Keeper at none against Fermento's 4. Kombucha Keeper also leads on iOS requirement (15.1 vs 17.0). Fermento's advantage is update cadence (monthly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Fermento sells 4 in-app purchases, starting at $3.99 per 7 days. Kombucha Keeper asks for nothing beyond the download.

Fermento ships an update monthly, Kombucha Keeper every 2 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Fermento | Kombucha Keeper |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 111 MB | 23 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Drobinin Limited](https://appshunter.io/developer/1713029153) | [Wesley Dudok van Heel](https://appshunter.io/developer/1726921748) |

## What reviewers say

### Fermento

[App page](https://appshunter.io/ios/app/fermento-fermentation-journal/id6470132496)

Track and manage all your fermentation projects, from sourdough and cheese to kombucha and pickles. Features smart timelines, custom reminders, and helpful calculators for precise results. Includes advanced logging and export options for professional use.

**Highlights:** Unlimited fermentation batches, Customizable timelines and milestones, Smart reminders for tasks, pH, salt %, and weight tracking, Culture management, HACCP decision-tree builder, Recipe scaling calculators

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fermentation Tracker Unlimited | $3.99 | per 7 days |
| Culture & Probiotic Pro | $7.99 | per month |
| Fermentation Tracker Unlimited | $59.99 | per year |
| HACCP Safety Compliance Pro | $179.99 | per year |


### Kombucha Keeper

[App page](https://appshunter.io/ios/app/kombucha-keeper/id6746731068)

**In-app purchases:** none


## Frequently asked questions

### Is Fermento free?

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

### Is Kombucha Keeper free?

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

### Do Fermento or Kombucha Keeper have ads?

Neither Fermento nor Kombucha Keeper shows ads.

### Which is updated more often, Fermento or Kombucha Keeper?

Fermento ships an update monthly, and Kombucha Keeper every 2 months. Most recently, Fermento was updated on October 30, 2026 and Kombucha Keeper on October 28, 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.*