Federighi explains how Apple helps developers use the iPhone Duo hinge

Apple software chief Craig Federighi said in an interview that an API lets developers read the iPhone Duo hinge angle with accuracy of about five degrees and detect the device's "pose." He said Apple relies on high-level frameworks like UIKit and SwiftUI so apps adapt to the foldable form factor automatically.

• API reads the iPhone Duo hinge angle with about 5-degree accuracy
• Developers get poses: book, on-table and tent
• Apple uses hinge angle for the outer screen defocus effect
• UIKit and SwiftUI abstract app adaptation for the foldable