Living fermentation, with company
Your kitchen doesn't ferment like the one in the recipe.
Does your recipe say 14 days? It doesn't know your kitchen sits at 19 °C in January. Fermenty works out your window from your conditions, moves it when you taste, and learns from every batch you close.
No sign-up · Free · 2 active batches, forever
How it works
Three steps, and none of them is counting days
Tell it your conditions
Your kitchen's temperature, the volume and the flavour you're after. Choose with a phrase — mild, balanced, strong — and it translates that into amounts.
Ferment with company
It gives you your grams, your window and the warnings that matter. You taste, you say how it's going, and the window shifts that same afternoon.
Close it and teach
You rate how it turned out. That's what turns a general prediction into yours for next time.
It learns your kitchen
Your first batch
It smells of apple and no longer of tea: it enters its window between day 6 and day 9.
Your fifth batch
It smells of apple and no longer of tea: it enters its window between day 6 and day 7, because your kitchen runs fast.
Two days less uncertainty — and not because the model got better: because it knows you now.
How it learns · What Pro includes
La app
What happens between the jar and the glass
Guided steps, with how it feels today
Every batch carries its steps and its window. You work through the stages, adjust ingredients as you go and say how it's doing — and that moves the prediction; it doesn't just sit there as a note.
Log it in one tap
pH, temperature, a measurement or an observation. It all lands in an ordered history and in the batch's timeline.
Close it, rate it, compare
When you finish you rate how it turned out and see the curves of the whole process. With Pro, that closing also calibrates your next windows.
- Tasting reminders · gentle nudges to taste, release gas or move it to the cold
- Safety guardrails · pressure, alcohol and margin — always, on the free plan too
- Complete guides · kombucha, kefir, sauerkraut, kimchi, vinegar and more
- Installs on your phone · no app store
- Your whole cellar · as many batches as you like, and which ones need you today
- Scale the formula · from one litre to thirty, with the amounts recalculated
For every kind of culture
Start with one
Bebidas fermentadas
See the shelf →Bebidas alcohólicas
See the shelf →Vegetales fermentados
See the shelf →Vinagres
See the shelf →Planes
Start free, decide later
The guardrails and the safety warnings are on the free plan, and they're staying there.
Our story
It started in a kitchen, among jars and notebooks
We've been fermenting at home for twenty years, and taking notes in notebooks that got lost for just as long. Fermenty is what we'd have liked to have: not one more recipe, but something that knew what happens in nuestra kitchen. The model inside it is anchored in fermentations we made and wrote down over years.
How it started →Founders programme
Testimonials? Not yet. We want yours.
Fermenty has just launched and we're not going to invent reviews. What we can do is ask you for something better: ferment with us.
The mentor learns from real batches, in real kitchens. It knows ours already; it doesn't know yours. If you've been fermenting a while and you'd like your way of doing it to feed the model, there's room among the founders.
Qué recibes
- Pro free for the six months of the programme
- Afterwards, the Early Bird rate for good
- Direct contact with the people building it
Qué pedimos
- Three complete batches, closed and rated
- A half-hour conversation about how it went
- Answering the odd short email now and then
Frequently asked
What does it cost?
The free plan is free forever: two active batches and the whole mentor inside each one — it formulates, gives you the window, moves it when you taste and warns you, with the safety guardrails included. What Pro adds is memory: it remembers your previous batches and calibrates the windows with your kitchen. Pro costs €3.25 a month paying yearly, or €4.99 a month on its own. Ver planes
Which ferments can I make?
Kombucha, water kefir, sauerkraut, kimchi, vinegar and more, across four shelves: fermented drinks, vegetables, alcoholic drinks and vinegars.
Do I need to install anything?
No. It runs in the browser and you can add it to your home screen like a normal app.
What if I know nothing about fermentation?
All the better. You choose the flavour with a phrase and the mentor supplies the grams and the days. The fine controls are there for when you want them.
Is my data mine?
Yes. We don't sell data and there's no advertising in Fermenty. You can export or delete yours whenever you like. Privacidad