watchOS Design Guidelines Apple Watch is a personal, glanceable device worn on the wrist. Interactions are measured in seconds, not minutes. Every design decision must prioritize speed of comprehension and brevity of interaction. --- 1. Glanceable Design (CRITICAL) The defining constraint of watchOS. If a user cannot extract the key information within 2 seconds of raising their wrist, the design has failed. Rules - W-GL-01 : Primary information must be visible without scrolling. The first screen is the only guaranteed screen. - W-GL-02 : Target interaction sessions of 5 seconds or less. Desig…