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Rot & Ferment

Idle fermentation, done right
Nils Rohwer · Games
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App info

Developer
Nils Rohwer
Category
Games, Casual, Simulation
Released
Sep 12, 2026
Version
2.1 (Oct 18, 2026)
Price
Free
Size
456.7 MB
Requires
iOS 15.0
Age rating
13+
Languages
English, French, German, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish

In-app purchases

Hire a helper$2.99
Skip the Whole Cellar$3.99
Hire a trusted carter$0.99
Time skip$0.99
Permanent x2 income$4.99
Remove ads$2.99
Buy a crock$1.99
Current prices, App Store US.
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About 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,…
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