RoastLogger: Coffee in AI

RoastLogger is a dedicated coffee roasting log and analysis app designed to help home roasters and coffee enthusiasts master their craft and achieve the perfect roast profile.

From manual hand roasting to motorized roasters, RoastLogger supports your journey with real-time timers, temperature tracking, event logging (1st crack, 2nd crack, etc.), Agtron roast level estimation from photos, and AI-powered roast diagnosis.

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■ Key Features
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【1】Real-Time Roast Logging & Timer
• Accurate roast timer with one-tap milestone logging: Charge, Yellowing, 1st Crack, 2nd Crack, Fire Off, and Done.
• Automatically displays Development Time from the first crack.

【2】Temperature Logging & RoR Calculation
• Log bean temperatures via manual input, voice commands, or supported USB thermometers (via USB OTG).
• Automatically calculates RoR (Rate of Rise) and Bottom temperature for precise heat control.

【3】Photo Logging & Agtron / Roast Degree Estimation
• Attach photos of green beans, roasted beans, and ground coffee to your log.
• Gray card (18% neutral) color calibration for consistent color accuracy under any lighting.
• Estimate Agtron score and roast degree (Light to Italian Roast) from ground coffee images.

【4】AI Roast Advisor
• Analyze your roasting temperature curves, milestone timestamps, and bean photos with advanced AI.
• Receive personalized advice tailored to your experience level (Home Roaster, Pro Roaster, Hand Roaster).

【5】Weather & Environmental Logging (Pro Feature)
• Automatically record ambient temperature, humidity, weather, and air pressure during roasting.
• Understand how environmental conditions impact your roast profile.

【6】Data Management & Export
• Search and organize all past roast logs.
• Record taste evaluation (Bitterness, Acidity, Sweetness, Body, Aroma).
• Share temperature charts and roast summaries as images or text.
• Backup and restore via Markdown and JSON formats.

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■ Perfect for:
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• Coffee roasters using manual pans, hand-crank roasters, or electric roasters.
• Anyone wanting to accurately track temperature curves, RoR, and crack times.
• Roasters looking to improve batch consistency and flavor profiles.
• Coffee lovers wanting AI insights on their roast data.

Elevate your coffee roasting journey with RoastLogger!

Recent changes:
[New Features & Improvements]
1. Added Temperature Calibration: easily align your roast profile to a target temperature (e.g. 180°C at 1st crack) with one tap
2. Temperature calibration offsets now automatically carry over to future roast sessions
3. Added real-time temperature display and calibration badges directly under the timer and in the log detail screen
4. Minor bug fixes and stability improvements