Designing for Both Watch Sizes
On any other device you’d write code for, a 4mm variation in size wouldn’t mean much. Heck, on a Mac you wouldn’t even be able to tell. On Apple Watch, however, the screen size differences between the 38mm and 42mm case sizes has a large impact on the layout of your app. Because the larger screen is both wider and taller, you’ll want to prepare your app for it. Xcode has amazing support built in to preview these sizes, so you’ll be able to ship good-looking apps for both watch sizes even if you don’t have one of each on hand for on-device testing. Fortunately, the size difference is the only thing you have to worry about here—all of the varieties of Apple Watch have identical performance specifications, so an app ...
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