1. Spread your grounds
Sprinkle a small sample of ground coffee in the center of the coaster and use a brush to separate any clumps.

2. Open CoffeeOS → Particle Analyzer
Launch the Particle Analyzer Tool in CoffeeOS and swipe left to open the phone camera. Align the coaster inside the on-screen guide.

3. Capture & analyze instantly
CoffeeOS calculates the full particle distribution — D10, D50, D90, Mode, SD, and uniformity, in seconds.

4. Data flows everywhere
Instantly available across CoffeeOS Tools, including the Grinder Converter, Brew Recorder, Brew Controller, and more, so you can dial in with real particle data.

No extra hardware needed
Perfect for getting started understanding particle analysis.