iPhone X UI guidelines, screen details and layout
iPhone X includes a large, high-resolution, rounded, edge-to-edge display that delivers an immersive, content-rich experience like never before.
Screen Size
Dimensions: 1125px x 2436px (375pt x 812pt @3x).
Layout
When designing for iPhone X, you must ensure that layouts fill the screen and aren’t obscured by the device’s rounded corners, sensor housing, or the indicator for accessing the Home screen.
Cropping and aspect ratio
Be mindful of aspect ratio differences when reusing existing artwork.
iOS Device Screen Sizes
iOS 11 UI Design Resources by Apple
More info: https://developer.apple.com/ios/human-interface-guidelines/overview/iphone-x/
Gestures: https://developer.apple.com/ios/human-interface-guidelines/user-interaction/gestures/
Adaptivity and Layout: https://developer.apple.com/ios/human-interface-guidelines/visual-design/adaptivity-and-layout/