I know we’re all impatiently awaiting the iPhone Duo simulator… but a good starting point is turning on landscape support for your iPhone app and seeing what’s broken
Resizable Xcode previews and resizing in iPhone mirroring will also tell you a lot about how your app will react. Even if your app is SwiftUI, this video (coincidentally starring my manager) has a ton of relevant info: developer.apple.com/videos/p…
