# CrackLog: Coffee Roast Log — Tap the crack, mark the curve > Manual coffee roast logging with real-time curve visualization and batch tracking. (iPhone/iPad app by KYUNGHWAN KIM.) - Source: https://appshunter.io/ios/app/cracklog-coffee-roast-log/id6794964893 (this page in markdown: same URL + `.md`) - Developer: [KYUNGHWAN KIM](https://appshunter.io/developer/6789523292) - Category: Food & Drink, Utilities - Price: Free - Rating: 4.50/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.4 · 40 MB - Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more - Released: 2026-08-06 - Data updated: 2026-09-29 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/cracklog-coffee-roast-log/id6794964893/reviews.md ## What is CrackLog? The moment you hear the crack, hit the big button once. A dot lands on your curve. Log time, temperature and first/second crack by hand and the roast curve draws itself in real time. Drop the beans and that batch becomes a card in your collection. No account, no server. Your logs live on this phone only. HOW IT WORKS • Charge: the timer starts at 0:00. • During the roast: log the temperature you see on your roaster as often as you like. The screen stays awake while the timer runs. • Crack: when you hear it, tap First Crack (then Second Crack). A dot is pinned to the curve at that second. Wrong tap? Undo it right there. • Drop: the timer stops, total time and DTR are worked out, and a batch card is made. TRY IT BEFORE YOU ROAST A 10-minute roast compressed into 30 seconds. Without a single green bean, tap the cracks yourself and feel the dot land. Demo batches stay out of your stats and overlays. MANUAL ON PURPOSE You write down the temperature you read on the roaster, and you tap the crack when you hear it. The app never picks a roast level for you and never scores your roast. It just keeps what happened, as it happened. DIALS, LOGGED IN THE MOMENT Every time you turn fan or power (1–9), one tap. It draws as a step line in its own lane on the curve and sits in a table on the card, so next time you roast the same bean you can follow "fan 7 at 3:20" exactly. Tap yellowing and end of first crack too, and your drying, Maillard and development ratios line up. Preheat and room temperature go in the batch details. WHAT'S ON A CARD • Time × temperature curve with first and second crack dots • Fan and power changes, yellowing and end-of-first-crack times • Bean, origin, charge weight, drop weight, yield, roaster used, preheat temp, room temp • Roast level (8 steps from Light to Italian, chosen by you) • A one-line roast note Browse your cards by bean or by roast level. No nagging to roast every day. No missions. SIDE BY SIDE WITH YOUR LAST BATCH Overlay the previous curve for the same bean as a ghost and compare as you roast. Tap "Roast again with these settings" on a card and the bean, charge weight, roaster and preheat temp are already filled in. ROASTER'S KIT (optional, one-time purchase) • Replay guide: start a roast with the same bean and the last batch's fan/power changes and crack times sit right beside the timer. • Multi-curve overlay: stack up to 3 earlier batches on one curve. Not a subscription. What's free today stays free. YOUR LOGS ARE YOURS Export every batch to a single file and import it back. Wipe everything at once from Settings. No account · no server · no internet for logging · no photo, mic or location access. No ads, no subscription. One optional lifetime purchase, handled by the App Store. ## Key features - 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 ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/cracklog-coffee-roast-log/id6794964893/reviews.md ### 4/5 — Minimalist *2026-08-11* This really does what I need, graphs temp over time and marks 1st crack. ## Frequently asked questions about CrackLog ### 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. ## Version history (last 3 releases) ### 1.1.1 — 2026-09-15 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. ### 1.1.0 — 2026-09-14 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. ### 1.0.0 — 2026-08-06 No release notes. ## More apps by KYUNGHWAN KIM - [Stampic: Travel Photo Map](https://appshunter.io/ios/app/stampic-travel-photo-map/id6789523290) - [Warmthly: Keep in Touch](https://appshunter.io/ios/app/warmthly-keep-in-touch/id6789600652) - [Everysky: Sky Diary & Journal](https://appshunter.io/ios/app/everysky-sky-diary-and-journal/id6789611050) - [Shotaway — Screenshot Cleaner](https://appshunter.io/ios/app/shotaway-screenshot-cleaner/id6789611184) - [Fanspot: K-Pop Fan Map & Cafes](https://appshunter.io/ios/app/fanspot-k-pop-fan-map-and-cafes/id6789989805) - [NanaFrame: Family Photo Widget](https://appshunter.io/ios/app/nanaframe-family-photo-widget/id6790092570) All apps by KYUNGHWAN KIM: https://appshunter.io/developer/6789523292 ## Related topics [dark roast](https://appshunter.io/ios/topics/dark-roast) · [dark roast for coffee lovers](https://appshunter.io/ios/topics/dark-roast-for-coffee-lovers) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-29.*