Minimalist
This really does what I need, graphs temp over time and marks 1st crack.
Free
About
Manually log coffee roasting details in real-time, including temperature, crack events, and fan/power adjustments. Visualize your roast curves and save batches as cards for easy comparison and future reference. Export your data for safekeeping.
✓Real-time roast curve drawing
✓Manual temperature and crack logging
✓Fan and power adjustment tracking
✓Batch card collection
✓Side-by-side roast comparison
✓Data export and import
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What's New in CrackLog
1.1.1
September 15, 2026
Fan and power dial (1-9) logged by tap: step lines over the curve, a table on the batch card. From one user's email. Tap Yellowing and End of first crack: drying, Maillard and development ratios. New Preheat temp and Room temp fields. Roast again with these settings, right on the card. Roaster's Kit (one-time, not a subscription): Replay guide shows last batch's fan/power and crack times by the timer for the same bean; Multi-batch overlay, up to 3 batches. Free stays free.
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FAQ
Does CrackLog have ads?
No, CrackLog is ad-free. The app is designed to provide an uninterrupted logging experience for users.
What is the price of CrackLog?
CrackLog is free to download and use. There is an optional one-time purchase called 'Roaster's Kit' for advanced features.
How does CrackLog track roasts?
CrackLog uses manual input for temperature, fan, and power adjustments. Users tap to log first and second crack events as they hear them, with the curve drawing in real-time.
Can I compare my roasts with CrackLog?
Yes, CrackLog allows you to overlay your previous roast curves as a ghost image for direct comparison while you roast. The 'Roaster's Kit' upgrade enables stacking up to three earlier batches.
Where are my roast logs stored?
Your roast logs are stored exclusively on your phone. CrackLog does not use an account or server, ensuring your data remains private and local.
Can I export my roast data from CrackLog?
Yes, you can export every batch to a single file. This allows you to back up your data or transfer it if needed.
What devices does CrackLog support?
CrackLog is currently supported on iPhone devices. It is rated for ages 4 and up.
How often is CrackLog updated?
The latest version of CrackLog is 1.1.1, last updated on September 15, 2026. Updates are released to improve functionality and reliability.