
Fermento
Home fermentation jar tracker
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Free
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About
A jar of vegetables in brine comes down to three questions: how much salt, how long, and whether the stuff floating on top is supposed to be there. Fermento answers all three.
You pick your vegetable, the app works out the salt and gives you a ready date that accounts for how warm your kitchen is. You add notes and photos as the days pass. And the day something looks strange, the diagnostic walks you to the right answer in a few questions: mold, kahm yeast, or a
perfectly healthy ferment.
What you can do:
- Start a jar in seconds with the right salt calculation (dry salt or brine)
- See a clear timeline and get a realistic ready date
- Keep a photo journal to watch your ferments evolve
- Browse curated recipes (sauerkraut, kimchi, pickles, and more) or save your own
- Use the "Is this normal?" diagnostic whenever you have a doubt
- Get reminders so no jar is forgotten
- Switch between French and English, metric or imperial units
Everything stays on your phone. No account, no cloud, no tracking, no analytics. Nothing ever leaves your device.
Happy fermenting.
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What's New in Fermento
1.0
September 29, 2026






