The visual treatment of user interface elements on Apple’s mobile operating system, characterized by curves at the edges of rectangular shapes, contributes significantly to the system’s overall aesthetic. A common manifestation of this design is evident in the appearance of app icons, notification panels, and various system controls, softening their visual impact and creating a more approachable user experience. Consider, for example, the shape of a typical app icon on an iPhone; its corners are not sharp 90-degree angles, but rather segments of a circle smoothly blending into the straight edges.
This design element offers several advantages. By replacing sharp corners with curves, it reduces the perceived aggressiveness of the interface, fostering a sense of visual harmony and making the interface feel more intuitive and user-friendly. Historically, this design choice aligns with a broader trend in interface design toward softer, more organic forms, deviating from the stark, geometric aesthetics of earlier computing systems. This shift reflects a greater emphasis on user-centered design principles.