DOSE - Coffee Grind Analysis

A napkin is all you need. Photograph your ground coffee to measure the particle size, analyze the distribution, and record every result.

DOSE analyzes your coffee grind size from a single photo. Even a kitchen towel or napkin works perfectly. Measure your grind at home or at the café in seconds.

■ Measuring is simple

• Spread the grounds Scatter your ground coffee evenly over a sheet of paper, a napkin, or a kitchen towel.

• Find good light Natural light or bright indoor lighting is all you need. Just avoid harsh shadows.

• Set distance and angle Follow the on-screen guide: hold the camera about 18–24 cm away and parallel to the surface.

• Capture Center the grounds in the frame and take one shot. That's it.

■ What you'll learn

• Particle distribution See D10 (small) · D50 (median) · D90 (large), mean, fines ratio, uniformity, and more — alongside a distribution histogram.

• Brew-method guidance Get advice on grinding finer or coarser for espresso, pour-over, French press, and other methods.

• AI Barista insights (on supported devices, iOS 26+) Reads your results and suggests how to dial in your next cup.

• Save and share Save your analysis card as an image and share it.

■ What's coming

• Compare your history Line up your saved measurements to track how grind size shifts with each grinder setting — and how consistent it stays.

■ Made for

• Home brewers who want more consistent extractions • Anyone dialing in a new grinder by the numbers • People who want to tell espresso and filter grinds apart precisely • Baristas who want to check grind uniformity and fines firsthand

Taste the difference in every cup — backed by data.