Remember exactly what made your best batch great
Fermentry is a brew log for kombucha. Track tea, sugar, temperature, pH, and taste for every ferment, so each batch builds on the last instead of starting from a guess.
Start your brew logFree, passwordless login. Just your email.
Log readings with wet hands
Standing at the jar with a thermometer? Temperature and pH go in with a couple of taps on your phone. No notebook, no spreadsheet.
From F1 to the last bottle
Follow the first ferment, then split it into flavored F2 bottles. Rate every bottle 1–10 and note sweetness, acidity, and fizz, or keep it F1-only. Your brew, your rules.
Start where you left off
New batches come prefilled with your last recipe: tea blend, sugar, starter. Change what you're experimenting with, keep the rest.
Hand off the brews
Going on holiday? Invite someone to your brewery and they can keep the readings coming while you're away.
Chat with your brew
Fermentry speaks MCP. Connect Claude and ask questions across your whole brew log: "which tea blend rates best?" or "how long did my fizziest batch ferment?" Every answer comes from your own data.
How it works
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Start a batch
Recipe prefilled from your last brew
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Log & bottle
Readings during F1, flavors at bottling
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Taste & repeat
Rate it, learn, brew the next one better