FermenTree
FermenTree

Learn. Ferment. Grow.

Every ferment has a lineage. One batch becomes the starter for the next — split it, follow it from F1 through F2, and watch your ferments branch into a real family tree.

Download on the App Store Coming soon — currently in review with Apple
How it works

Every ferment has a lineage

01

Start F1

Begin a new batch and track it through its first fermentation stage.

02

Finish & split

When F1 is ready, carry part forward — 20% by default, yours to change — as the starter for a brand-new F1.

03

Track F2

The rest moves into F2 for its second stage, right through to the fridge. Split again at any point to branch further.

04

Rate & learn

Rate the finished batch and let Apple Intelligence surface what's producing your best results — entirely on-device.

More ways it helps

Built around how ferments actually grow

🌡️

Smart predictions

Connect a HomeKit temperature sensor and FermenTree learns from your history to estimate how long each stage will take.

📎

NFC quick-open

Tap a tag on a jar to jump straight to that batch's place in its tree — no searching required.

🔒

No accounts, ever

Open the app and start logging. There's no sign-up, no login, and nothing to lose access to.

Private by design

Your ferments are your business

FermenTree doesn't run a server, doesn't create accounts, and doesn't use analytics or advertising SDKs. Even its predictions and Apple Intelligence insights run entirely on-device — there's simply nothing to track.

Read the full privacy policy →