Apple’s First Foldable Adds Two Screen Sizes to Consider

Two displays put adaptable layouts in focus

The Duo’s 7.6-inch inner display and 5.4-inch outer screen give software developers two differently sized surfaces to consider within one device. Those dimensions suggest a concrete design concern: how an interface should use the larger inner display while remaining useful on the smaller outer screen. Apple’s entry into foldables may give adaptable layouts greater relevance for iPhone development, though the launch alone does not establish how widely the format will be adopted.