Free
About
Kombucha fermentCal is a practical app for home fermentation and growing. It helps you with kombucha, Tibi (water kefir), rejuvelac and sprouting — all in one place.
In the app you will find:
ingredient calculations for kombucha F1 and F2
guides for beginners and advanced users
overview of saved and active batches
practical tips and fermentation alerts
recommended products for kombucha, sprouting and matcha
helpful information on temperature, alcohol and common situations in home fermentation
Available in Czech, Slovak and English.
Perfect for anyone who wants better control over their fermentation and key information always at hand.
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What's New in Kombucha fermentCal
2.0
July 23, 2026
New: Milk Kefir section! We've added full milk kefir support — a calculator, a step-by-step guide, and an overview of the gear you need. Grain-based calculator: enter how many kefir grains you have and it works out the amount of milk and recommends the right jar size. New products and updated prices and photos across the shop (Kombucha SCOBY Red, the Red Rumi set, new microgreens varieties, and more). Improved discounts — unlock them by saving and tracking your batches. Batch tracking now works for milk kefir too. Small improvements and fixes for a smoother experience. Thanks for fermenting with us!
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