Castor Workshop

Products

Kaapi

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

Download on the App Store Visit Kaapi

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

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.

Download on the App Store Visit HeartMirror

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.

Contemporaries

Find four groups of four that existed at the same time.

Play today’s puzzle

The Contemporaries start screen for Thursday, 5 November 2026, puzzle No. 8.

Sixteen history cards with four picked: the Greek alphabet, the first Olympics, the Iliad and the Assyrian conquests.

The results screen: solved perfectly, four sets of contemporaries spanning 2,700 years, each group on a timeline with its dates and a fact.

Still whittling

Call schedulerA web app that builds fair on-call schedules for medical residents.
Reading vocab ShortcutAn Apple Shortcut that saves the words you look up while reading straight to Notes.