Ferment Lab: Batch Log
pH tracker & batch journal
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
AI reads your pH curve and tells you if your ferment is safe—or needs attention. Kombucha, kimchi, cheese, hot sauce, and more.
Ferment Lab is the batch tracker home fermenters have needed for years. Log every jar, vessel, and crock — with pH readings, photos, tasting notes, and scheduled check-ins — and let on-device AI tell you if your ferment is on track.
AI pH Safety Advisor
Log your pH readings as your batch develops. Ferment Lab analyzes your acidification curve against culture-specific safety profiles (kimchi, kombucha, brine pickles, and cheese all behave differently) and tells you: on track, watch it, or discard. No guessing. No forum searching at midnight.
Built for every ferment except bread
Kimchi. Kombucha. Kefir. Hard and soft cheese. Hot sauce. Pickles. Sauerkraut. Vinegar. Miso. Tempeh. Wine and cider. Each culture gets the right schedule, right safety thresholds, and right guidance. Sourdough? That's Crumb — a separate app for bread bakers.
What you track
Salt %, temperature, vessel size, pH readings over time, tasting ratings, and a full photo journal. The batch detail screen is the most organized fermentation log you've ever had.
Designed for the counter
Live Activities keep your next check-in on your lock screen. Widgets show all active batches at a glance. Siri shortcuts log a pH reading without unlocking your phone.
All data stays on your device or syncs privately via iCloud. No accounts. No server.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://brainrash.com/apps/ferment-lab/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Initial release.
The developer, l0g1c.us, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Justin Pruskowski
- Size
- 4 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Ferment Lab Pro Annual $29.99
- Ferment Lab Pro Monthly $3.99
- Ferment Lab Pro Lifetime $49.99
- Copyright
- © 2026 Brainrash