Apple's product design follows a consistent philosophy where objects closer to the human body have progressively rounder corners, measured using a 'roundness score' formula. The article reveals that Apple uses squircles (complex curves without discontinuities) rather than simple circles, with personal devices like AirPods and Apple Watch scoring around 50% roundness, while distant objects like displays score only 2–3%, following designer Naoto Fukasawa's principle that proximity to humans correlates with roundness.