Kombucha tracker for iPhone
Fermenta tracks every batch from sweet tea to the fridge. It tells you when to taste, bottle, and chill, and remembers what worked last time.
Coming soon
For iPhone with iOS 26 or later
40 built-in flavors, plus your own
How it works
Fermenta will guide you through the process and help you know what to pay attention to along the way.
Sweet tea, a SCOBY, and starter liquid in a clean glass jar.
The culture turns the sugar into acidity over 7 to 10 days.
Taste it to check the balance between sweet and tart.
Bottle it, add flavors, and let the carbonation build.
The fridge slows fermentation and lets the carbonation settle.
Pour a glass, rate the batch, and plan the next one.
01 Every batch
Every batch shows its day, its target, and the one thing to do next: bottle it, chill it, or just wait. Extend a stage that needs more time, or skip ahead when it’s ready early.
Fermenta never moves a batch forward on its own. You always decide when it’s ready.
02 Reminders
Get a nudge when a batch needs you: time to taste, ready to bottle, check the carbonation, ready for the fridge. Act right from the notification, without opening the app.
Choose which reminders you get, and when they arrive, in Settings.
03 Widgets and calendar
Small and medium widgets follow one brew, with an action button built in. The large widget shows up to three batches at once. The calendar puts bottling, chilling, and ready dates side by side.
Touch and hold the app icon to jump straight into a batch or start a new one.
04 Logs and flavors
Log flavor, pH, temperature, and carbonation as the batch develops. When you bottle, split it into groups and give each one its own flavors, from 40 built-in options or your own.
05 Every finished batch
Rate a finished batch, add a tasting note, and brew it again with one tap: same tea, same amounts, same durations. Share it as a summary card, with or without dates.
Tools
Plan a batch, troubleshoot one, or look up a term, all inside the app.
Take a breath. Most odd looking kombucha is not mold, and this only takes a minute.
Answer a few questions and compare reference photos to tell kahm yeast, a healthy new pellicle, and real mold apart.
This is a guide, not a lab test. When you are still unsure at the end, treat it as mold.
Tea, sugar, and starter liquid for any volume.
First and second fermentation, step by step, with a closer look at each one.
Mold, low carbonation, or off smells: what to do.
Quick answers to common questions.
SCOBY, pellicle, starter liquid: the brewing terms, from A to Z.
Fermenta Pro
A SCOBY hotel is a vessel where spare cultures rest in starter liquid between batches.
Log each feeding, get a reminder to check on it every one to six months, and start your next batch straight from the hotel.
Pricing
Fermenta Pro is a single one-time purchase. No subscription.
Fermenta
Free
Brew as many batches as you like, one at a time.
Fermenta Pro
One-time purchase
The price is shown in the App Store before you buy.
Open the app and start brewing.
Your brews live on your device.
Through your own iCloud account.
No connection needed to log a batch.
And your data is never sold.
Nothing follows you across other apps.
FAQ
Yes. Fermenta is free with one batch fermenting at a time. Fermenta Pro is a one-time purchase that unlocks unlimited batches at the same time and the SCOBY hotel.
Yes. For a batch still in F1, select its original start date. For a batch already in F2, choose Already brewing and enter its F1 and F2 dates, bottling details, and flavors.
No. Fermenta Pro is a single purchase. You pay once and keep it.
No. Dates, progress, and reminders help you decide when a brew needs attention, but you choose when to bottle it, start chilling, or finish it. You can also move it forward early or extend the current stage.
Fermenta is made for iPhone. There is no iPad or Android version.
No. Switching between metric and imperial only converts how quantities and temperatures are displayed. The physical amounts saved for your brews remain the same.
Yes. Your data is stored locally and the app continues to work offline. If iCloud is available, changes sync with your other devices when a connection returns.
Completed brews can be shared as a generated summary image. Open the completed brew, tap Share, choose whether to include dates, and use the iPhone share menu.
English, Spanish, Portuguese, German, French, and Italian.
Fermenta is a tracking tool, not a food safety or medical guide. Follow safe fermentation practices and decide whether a batch is safe to consume.
Start your first batch and Fermenta will keep count of the days.
Coming soon
For iPhone with iOS 26 or later
