# Rot & Ferment — Idle fermentation, done right

> Idle fermentation, done right (iPhone/iPad app by Nils Rohwer.)

- Source: https://appshunter.io/ios/app/rot-and-ferment/id6800438731 (this page in markdown: same URL + `.md`)
- Developer: [Nils Rohwer](https://appshunter.io/developer/6777538815)
- Category: Games, Casual, Simulation
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 15.0 · 154 MB
- Languages: American English, German (Germany), Japanese, Brazilian Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2026-09-12
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/rot-and-ferment/id6800438731/reviews.md

## What is Rot & Ferment?

Most idle games make you wait because waiting is the monetization lever. Rot & Ferment makes you wait because that's what fermentation actually is.

You run a small cellar: a few crocks, jars, and barrels, and a rotating cast of things worth aging - sourdough, kimchi, sauerkraut, yoghurt, kefir, tomme, cider, wine. Start a batch, and it needs real time. Minutes for a quick ferment, hours overnight, a full day for something worth the wait.

THE DECISION ISN'T "WHEN IS IT DONE" - IT'S "WHAT DESERVES THIS VESSEL RIGHT NOW"

Every batch rises in value, peaks, then slowly drifts past its best. Pull it early for safe, modest money. Hold it to the peak for the real payoff. Forget about it, and it doesn't spoil to nothing - it just costs you the upside. Nothing in this cellar punishes you for living your life.

Each recipe leans one of two ways:
• Safe - a wide, forgiving window. Never loses money, whenever you get back to it.
• Greedy - a narrow peak and a steep drop-off. Higher reward, if you're actually on time.

That choice repeats across six absence lengths, from "checking my phone right now" to "see you in the morning" - so there's always a right answer for how long you're actually going to be gone.

BUILD THE CELLAR THAT LETS YOU AGE MORE

Early recipes are ready in minutes. The long, valuable ferments - the tomme, the wine - are locked behind upgrades: more crocks, a cold cellar, humidity control. Every upgrade widens a window or slows a decay, so the game never turns into "wait less, click more." It turns into "cellar space is scarce, spend it well."

Offline the whole time? Your batches keep aging without you. Come back to a full report of what happened while you were away.

No forced ads, no pay-to-skip pressure. If a boost ever helps, it's your call, not the game's.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 3 releases)

### 1.1.1 — 2026-09-15

Leaderboards!

### 1.1 — 2026-09-14

Gallery view for all of your achievements.

### 1.0 — 2026-09-12

No release notes.

## More apps by Nils Rohwer

- [Byte Coach](https://appshunter.io/ios/app/byte-coach/id6777538813)
- [Marrowcompanion](https://appshunter.io/ios/app/marrowcompanion/id6779556401)
- [Tab - Split Expenses](https://appshunter.io/ios/app/tab-split-expenses/id6802440251)

All apps by Nils Rohwer: https://appshunter.io/developer/6777538815

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-17.*