GrindLab turns your iPhone camera into a precision coffee grind analyzer. Snap a photo of your grounds and get instant, micron-level particle size measurements — no extra hardware needed.
Pick a grind type, snap a photo, get the numbers. That's the whole workflow.
Median size, uniformity score, fines percentage, and boulders percentage — so you know exactly how consistently your grinder performs.
Calibrate with a coin or ruler for true micron accuracy. Computer vision detects individual particles and measures their size distribution.
Log how your coffee tastes — sour, bitter, balanced, weak — and the Coffee Compass connects flavor feedback to grind adjustments for your next cup.
Step-by-step guidance for V60, Espresso, French Press, and Chemex, plus custom recipes. Live Activities put your timer on the Lock Screen and Dynamic Island.
Track every cup: beans, roaster, brew parameters, and tasting notes with star ratings. Search and filter your history to spot trends.
Save analyses and compare them side by side. Overlay distribution charts, view delta metrics, and set a baseline to track grinder adjustments.
Fine and consistent, where a few boulders can channel a shot. GrindLab shows the fines that cause bitterness and the boulders that cause sour pulls.
The medium range where uniformity matters most. See how much of your grind actually lands in the sweet spot for even extraction.
Coarse for immersion brewing. Track the fines percentage that sneaks through the mesh and muddies the cup.
Extra coarse for long, slow steeps. Confirm your grinder can actually hold consistency at its widest setting.
“Everything happens on your iPhone. No account, no analytics, no server — your coffee data is yours. Full stop.”
Photos are processed on-device with Apple's Vision framework and never leave your phone. Read the full privacy policy.
Download on the App StoreQuestions? Write to [email protected].