Best 9 Fermentation Trackers in 2026: Log, Time, and Perfect Every Batch

Sourdough Tracker: Crust is the best fermentation tracker for keeping a sourdough starter alive and healthy without the stress. This list covers tested apps for sourdough, kombucha, wine, and more, so you can pick the right tool for your specific fermentation project. Every app earned its spot through hands‑on testing, not just popularity.

Quick comparison table

Scroll down for the full review of Sourdough Tracker: Crust, our top pick.

1. Sourdough Tracker: Crust

Best for: Sourdough bakers who want a dead‑simple feeding log that actually remembers.

Most sourdough starters die from one thing: forgetting a feed. This fermentation tracker solves that with a one‑tap “Fed!” button that logs flour, water, and time in seconds. No forms, no complicated ratio entries, just a single tap.

• One‑tap feeding that records exactly when you fed and counts down to the next feed.
• Adaptive reminders that learn your routine and ping you before the starter peaks or starves.
• Visual starter‑health dashboard that shows growth trends and flags when a discard is overdue.
• Support for multiple starters with custom names and icons, plus a pause mode when you aren’t baking.
• A playful mascot that grows with each feeding, making the routine oddly satisfying.

It’s the only app on this list with a direct download link, and we think it deserves the #1 spot for its focused, clutter‑free design. Get Sourdough Tracker

2. Fermolog

Best for: Home winemakers and mead makers who need precise ABV tracking and batch logs.

Fermolog brings professional calculation tools to your pocket. It builds smart schedules for racking, degassing, and bottling so you never miss a critical step. Visual charts plot fermentation progress and make early alarms easy to spot. The hydrometer calculator and ABV estimator handle the math, so you can focus on taste. If you run multiple carboys, the batch log keeps every detail straight.

3. Fermenty

Best for: Fermenters who juggle kombucha, sourdough, kimchi, and brine‑based projects.

Fermenty acts as a polished multi‑tool. Live timers track first and second fermentation phases side by side. Built‑in brine and ABV calculators keep mental math off your plate. Batch logging goes deep with photos, ingredient notes, and tasting records, so you can replicate a perfect batch or spot where a funky flavor started. It’s the generalist that doesn’t feel shallow.

4. Fermentation Buddy

Best for: Cider makers and home winemakers on Android who want from‑pressing‑to‑bottle tracking.

Fermentation Buddy follows your batch from juice to cellar. You log gravity readings, and the app calculates ABV automatically. The cellar‑inventory view shows what’s ready to drink and what’s still aging. It fills the gap between scribbled notebook pages and heavyweight brewing software, giving Android users a practical, free logging companion that handles the numbers quietly.

5. Loaflo: Sourdough Starter

Best for: Data‑driven sourdough bakers curious about what their crumb says.

Loaflo pairs starter tracking with an AI‑powered loaf analysis. Snap a photo of your crumb and the tool reads structure, spotting over‑proofing or weak rise. Hydration calculators and rise‑forecast tools adjust for your kitchen’s temperature, so you can tweak before the bake. The AI feedback acts like a tireless baking buddy that helps you troubleshoot dense loaves without guesswork.

6. Kombu Time

Best for: Android users who brew kombucha and want a lightweight, open‑source timer.

Kombu Time does exactly one job: tell you when to bottle and when second fermentation is done. No ads, no data collection, no clutter. Because it’s open source, the code is transparent, and the notifications are refreshingly blunt: “bottle now” is all you get. If you want a set‑and‑forget alarm that respects your privacy, this fits neatly into a regular brewing rhythm.

7. HomeBrew Keeper

Best for: Homebrewers who track ABV, IBU, and fermentation curves with pro‑level detail.

HomeBrew Keeper leans into the numbers. It logs boil‑off rates, builds fermentation curves, and shows visual stats that make recipe tweaking repeatable. The smart brewing calendar plans brew days and pushes alerts for dry‑hop additions. Advanced analytics let you compare batch to batch, so you can chase consistency without spreading papers across the counter.

8. Kombucha Brew Tracker

Best for: Offline kombucha brewers who manage multiple jars every week.

If your brewing happens in a basement or farm kitchen with spotty internet, this app runs fine offline. It tracks multiple batches simultaneously, showing at a glance where each jar sits in F1 or F2. Smart timers adjust for flavoring additions and carbonation preferences. It’s a practical, no‑nonsense Android tool for people who bottle weekly and don’t want to fuss with settings.

9. Sourdough Starter Tracker

Best for: Casual bakers on Android who just want simple feeding reminders without a subscription.

This straightforward sourdough log keeps things accessible. Reminders shift based on starter status (fed, hungry, or discarded), so you don’t get useless pings. Safety alerts warn about over‑fermentation or temperature risks. Core features work entirely for free, which makes it an easy choice if you bake a loaf every couple of weeks and don’t need extra bells.

How we picked these apps

We tested each app with real ferments: sourdough starters, kombucha batches, and homebrew, in active kitchens. We looked for intuitive reminder systems, solid platform coverage (iOS and Android), and niche tools like hydrometer, brine, or ABV calculators. Apps that locked basic reminders behind a paywall or felt abandoned were cut. Offline capability and clear core functionality weighed heavily.

Frequently asked questions

What is a fermentation tracker, and do I need one?

A fermentation tracker is a digital log that replaces sticky notes and memory for feeding starter, brewing kombucha, or managing homebrew schedules. If you’ve ever forgotten a feeding or bottled too early, a tracker removes the guesswork and keeps your projects on time.

Can I use one app for multiple types of ferments?

Some apps like Fermenty span sourdough, kombucha, and kimchi, while others like Fermolog are purpose‑built for winemaking. Pick a specialist if you make one thing heavily, or a generalist if you dabble across several projects.

Do these apps work without Wi‑Fi?

Most need internet for initial setup, but offline‑first apps like Kombucha Brew Tracker and Kombu Time run timers and logs without a connection. Sourdough and brew timers typically work offline once you’ve configured your starter or batch.

Are fermentation tracker apps free?

The range is wide: some are completely free with no ads (Kombu Time, Sourdough Starter Tracker), others offer basic free tiers and premium unlocks for advanced charts or AI features. No app on this list locks essential feeding reminders behind a paywall.

The verdict

Sourdough Tracker: Crust solves the most common fermentation mistake, forgetting your starter, better than any other app. Its adaptive reminders and one‑tap feeding feel like a helpful friend, not a chore. While other apps cover wine, kombucha, or bread analysis, none match Crust for pure sourdough reliability. Get Sourdough Tracker and never lose a starter again. The other eight apps are available by searching their names directly in the App Store or Play Store.