Ferment Tracker - Crock
Gut Health and Probiotic Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Free tier: 3 active ferments, 10 recipes. Paid Crock Pro subscription required for unlimited tracking and AI guidance.
Free: up to 3 active ferments, 10 recipes, 10 completed batches, 3 photos per batch, salt calculator, and reference guide. Paid Crock Pro subscription required for unlimited tracking/history/photos, AI guidance, PDF export, and custom icons.
Crock is the fermentation companion built for makers who care about craft. Track every batch from the first salt rub to the final taste test. Log check-ins, monitor pH and temperature, capture photos, and build a recipe journal that grows with your skills.
Whether you are fermenting sauerkraut in a ceramic crock, brewing a continuous kombucha, culturing water kefir, making kimchi by the jar, aging miso, lacto-fermenting hot sauce, or pickling crisp seasonal vegetables - Crock keeps every batch organized and on schedule.
TRACK EVERY FERMENT
Start a new batch in seconds. Set your vessel size, salt percentage, and target ferment time. Crock shows each active ferment on a clear dashboard with a color-coded status: bubbling away, ready to check, or finished and ready to eat.
- Active ferment dashboard with day count and status at a glance
- Check-in log with taste notes, pH reading, temperature, and aroma
- Photo documentation at every stage
- Salt percentage calculator built in
- Seasonal fermentation calendar to know what to make and when
- Filter and sort batches by type, status, or creation date
BUILD YOUR RECIPE JOURNAL
Stop losing your best batches to scribbled notes. Crock gives every recipe a proper home: ingredients, method, salt ratios, and your personal notes all in one place. Rate your results and refine over time.
- Structured recipe entries with ingredient lists and method steps
- Salt percentage and brine ratio fields for precision
- Star ratings to track your best batches
- Search and filter by ferment type
FERMENTATION REFERENCE GUIDE
New to fermentation or expanding into new ferment types? The built-in reference covers salt ratios, brine percentages, fermentation temperature ranges, and common troubleshooting for every type Crock supports.
- Salt guide with recommended percentages by ferment type
- Troubleshooting reference for common issues: mold, off-flavors, stalled ferments
- Seasonal calendar showing peak produce windows
AI FERMENTATION GUIDE (PRO)
Stuck on a batch? Get personalized advice from an AI fermentation guide. Ask about pH readings, adjust your salt ratios, troubleshoot a stalled kimchi, or get suggestions for what to ferment this season. The AI Fermentation Guide requires a paid Crock Pro subscription and is not included in the free app.
CROCK PRO
The features below require a paid Crock Pro subscription; they are not included in the free app:
- Paid Crock Pro subscription required: Unlimited active ferments (free tier includes 3)
- Paid Crock Pro subscription required: Unlimited recipe journal entries (free tier includes 10)
- Paid Crock Pro subscription required: Full batch history - every ferment you have ever made
- Paid Crock Pro subscription required: Unlimited photos per batch
- Paid Crock Pro subscription required: AI Fermentation Guide
- Paid Crock Pro subscription required: Export your recipe book as a PDF
- Paid Crock Pro subscription required: Custom app icons
Supports all common home ferments:
Sauerkraut - Kimchi - Kombucha - Kefir - Miso - Hot Sauce - Pickles - Brine Vegetables - Water Kefir
Download Crock and start your first batch today.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Karol Jaworski, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Karol Jaworski
- Size
- 2.5 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 18 or later.
- iPhone
Requires iOS 18 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Alcohol, Tobacco, Drug Use or References
- In-App Purchases
Yes
- Crock Pro $39.99
- Crock Pro $39.99
- Crock Pro $4.99
- Copyright
- © 2026 Karol Jaworski