# Kombucha Keeper vs Fermenta

The clearest difference is in-app purchases: Kombucha Keeper at none against Fermenta's 1. Kombucha Keeper also leads on iOS requirement (15.1 vs 26). Fermenta's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Fermenta sells 1 one-off in-app purchase. Kombucha Keeper asks for nothing beyond the download.

Kombucha Keeper ships an update every 2 months, Fermenta fortnightly. Both last shipped on October 28, 2026.

## The numbers

| Metric | Kombucha Keeper | Fermenta |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 23 MB | 38 MB |
| Requires iOS | **15.1** | 26 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wesley Dudok van Heel](https://appshunter.io/developer/1726921748) | [Javier Azorin Fernandez](https://appshunter.io/developer/1896289374) |

## What reviewers say

### Kombucha Keeper

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

**In-app purchases:** none


### Fermenta

[App page](https://appshunter.io/ios/app/fermenta-kombucha-tracker/id6766436912)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fermenta Pro | $4.99 | one-time |


## Frequently asked questions

### Is Kombucha Keeper free?

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

### Is Fermenta free?

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

### Do Kombucha Keeper or Fermenta have ads?

Neither Kombucha Keeper nor Fermenta shows ads.

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

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