Fermento
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Fermento

Master the art of fermentation with confidence and precision

Download Fermento on the App Store

For iPhone and iPad.

Read the story Designing Software for Things that Rot How a £150 eBay fridge and a decision tree taught me to stop asking internet strangers if my salami would kill me.
Fermento's batch list, titled 'The wait is worth it', with colour-coded cards for kimchi, gouda, a SCOBY hotel, bresaola, a country loaf and more A kimchi batch partway through: the next step is to check for kahm yeast, with pH, temperature and weight readings, a journal entry and a safety alert 'What are you making?' with patterned circles for cultures, veggies, bread, dairy, charcuterie, cheese, vinegar, miso, koji, alcohol and kombucha A sourdough starter called Bubbles: fed today, next feed tomorrow morning, with its family and taste notes Analytics for a wild blueberry mead: a temperature chart, insights and quick stats for pH and temperature A HACCP record for kimchi: a pH deviation with a 'record corrective action' button, critical control points and verification tasks

What are you making?

Each kind of ferment has its own steps and calculators.

Vegetable fermentsPickles, kimchi, sauerkraut, lacto-fermented vegetables Bread and sourdoughSourdough, rye, enriched Kombucha and sour drinksKombucha, kvass, water kefir, jun CulturesMaintain sourdough starters and SCOBYs, then reuse them in recipes Cheese makingFresh and aged cheeses Cultured dairyKefir, yogurt, cultured butter, fermented eggs
CharcuterieSalami, prosciutto, bresaola, coppa Miso and pastesMiso, fish sauce, fermented bean pastes Koji and tempehKoji cultivation, tempeh, fermented proteins Alcoholic fermentsWine, mead, beer, sake Vinegars and shrubsFruit vinegars, drinking vinegars, shrubs Enzymatic fermentsBlack garlic, fermented honey, aged foods

Try it here

Start with the salt

Enter your weights and get the percentage. In Fermento the number is saved with the batch, next to its timeline and readings.

Brine, hydration and feeding ratios

Salt Percentage 2.50% Salt percentage relative to vegetable weight
  • 2-3% for most vegetables
  • 3-5% for kimchi
  • 1.5-2% for delicate greens
Fermento saves the number with your batch. Download Fermento on the App Store
Fermento's batch list, titled 'The wait is worth it', with colour-coded cards for kimchi, gouda, a SCOBY hotel, bresaola, a country loaf and more

Every batch in one list

Colour-coded by what it is: kimchi next to gouda next to a country loaf. The ones that need you today are marked as due.

A kimchi batch partway through: the next step is to check for kahm yeast, with pH, temperature and weight readings, a journal entry and a safety alert

Know the next step

The day it is on, the step that is due, the latest pH, temperature and weight, and your journal with photos.

A sourdough starter called Bubbles: fed today, next feed tomorrow morning, with its family and taste notes

Feed it, name it, trace it

A starter has its own record: feeds, health, and the loaves and offshoots that came from it. Starters and SCOBYs

For professionals

HACCP without the binder

Build a plan with a decision tree for hazards and critical control points. Keep monitoring and verification logs with corrective actions, and export tidy PDFs for audits.

HACCP in Fermento

Questions

What is Fermento?

Fermento is a fermentation journal for iPhone and iPad. It keeps every batch on schedule with timelines and reminders, and logs pH, salt, weight, photos and notes in one place.

Which ferments can I track?

Sourdough feedings, kombucha brews, sauerkraut, kimchi and pickles, miso, tempeh and koji, cheese, charcuterie, mead and wine, vinegar, plus custom categories for anything else with a timer.

Does it calculate brine percentage?

Yes. Brine percent by weight, baker's percentage for dough hydration, and salt ratios for lacto ferments, in grams or ounces. A simple version of the calculator is on this site.

Can I track starters and SCOBYs?

Yes. Starters, SCOBY hotels and kefir grains have their own records with health, feeds and lineage, so you can see which batch came from which culture.

All questions

Keep every ferment on schedule

Fermento is on the App Store, for iPhone and iPad.

Download Fermento on the App Store