Supported Features
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Larger Text
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Dark Interface
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Differentiate Without Color Alone
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Sufficient Contrast
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Reduced Motion
CrackLog: Coffee Roast Log
Tap the crack, mark the curve
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Try it for 30 seconds before you roast. Run the demo batch, hit the big button when the crack comes, and a dot lands on the curve. A batch card then joins your shelf.
Hear the crack, press the big button once. A dot lands on the curve right there.
CrackLog is a roasting log for home roasters who read the temperature off the machine and listen for the cracks themselves. Start the timer at charge, log temps as you go, tap first crack and second crack when you hear them, and the roast curve draws itself in real time. At drop, the batch becomes a card in your collection. Nothing to sign up for and nothing uploaded: your roast curves and batch cards never leave the handset you tapped them into.
TRY IT BEFORE YOU ROAST
A demo compresses a ten-minute roast into thirty seconds. You tap the cracks yourself and watch the dots land, without a single green bean. Demo batches stay out of your stats and overlays.
A ROAST, START TO FINISH
Charge: the timer starts at 0:00.
Roasting: log the temperature shown on your roaster as often as you like. Keep the screen on while the timer runs.
Cracks: tap First crack when you hear it, then Second crack. The dot is placed at that exact second. Mis-tapped? Undo on the spot.
Drop: the timer stops, total time and DTR are worked out, and the batch card is made.
DONE BY HAND, ON PURPOSE
You type the temperature you see and you press the crack you hear. CrackLog never guesses your roast level and never grades the roast. It records what happened, as it happened.
FAN AND POWER, LOGGED IN PLACE
Each time you turn fan or power (1 to 9), one tap. The changes draw as a step line in a lane under the curve and sit in a table on the card, so next time with the same green coffee you can follow "fan 7 at 3:20" exactly. Tap yellowing and the end of first crack too and the drying, Maillard and development ratios are summarised for you. Preheat and room temperature go in the batch details.
WHAT A CARD HOLDS
Time-by-temperature curve with first and second crack dots
Fan and power changes, yellowing and end-of-first-crack times
Green coffee, origin, charge weight, drop weight, weight loss, roaster used, preheat and room temperature
Roast level, eight steps from Light to Italian, chosen by you
One line of roasting notes
Browse the collection by green coffee or roast level. There are no streaks, no missions and no nagging to roast every day.
SIDE BY SIDE WITH THE LAST BATCH
Overlay the previous batch of the same green coffee as a translucent curve and compare as you roast. Roast again from any card and the green coffee, charge weight, roaster and preheat are filled in before you start.
ROASTER'S KIT (OPTIONAL, ONE-TIME PURCHASE)
Replay guide: start the same green coffee and the last batch's fan, power and crack times run alongside your timer.
Multi-batch overlay: up to three earlier batches on one curve.
Second temp: alternate between two readouts, such as bean temperature and exhaust temperature. Name them yourself and a second line is drawn on the curve.
Roaster profile: rename the two dials and set their ranges to match your machine.
Curve share card, green coffee stock, stats by green coffee, your own marks, card theme.
Not a subscription. Whatever is free today stays free.
YOUR RECORDS BELONG TO YOU
Export every batch to a single file and import it again. Delete everything in one step from Settings.
Logging works without an account, without a connection and without touching your photos, mic or location. Ads never appear and nothing renews. One optional lifetime purchase, handled by the App Store.
Roaster's Kit now logs a second temp. If your roaster shows two readings, like bean temp and exhaust temp, you can log either one while you roast, and the curve draws a second line. Name them in your roaster profile. Nothing connects to your roaster: you still type in the numbers you see, same as before.
Batch details and the finish screen also show the peak of the second temp. In Edit log, both temps sit in one list, so you can fix or delete either.
Everything free stays free.
The developer, KYUNGHWAN KIM, 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.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- KYUNGHWAN KIM
- Size
- 42.1 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Roaster's Kit $7.99
- Copyright
- © 2026 Dog Foot