Castor
Workshop

Useful products, made with care.

Products

Kaapi

Your tastiest cup of coffee is only a few adjustments away.

Log a brew, rate how it tastes, and get one adjustment. Repeat until you’re dialed in.

Kaapi’s shelf of coffee bags, each with its roaster and score. Rating a brew on a scale from much too sour to much too bitter. Kaapi suggesting one change: two clicks finer on the grinder.

HeartMirror

Live HR & zones on your phone.

Train effectively with live heart rate from any strap, Watch or band. Track your zones, program your workouts and monitor recovery. Every workout saved to Apple Health.

HeartMirror showing 130 BPM in Zone 1, with the five zones and a running timer. The HeartMirror Live Activity on the Lock Screen: 133 BPM in Zone 2, with a Skip button. A workout summary with average and max heart rate, a heart rate graph and interval splits.

Still whittling

The constellation Gemini in a dark sky full of stars, with the Milky Way along one side.