When you tap "Get" or the price button in the App Store, an animation will appear on the right edge of your screen with the words "Double Click to Install".
The "Double Click to Install" prompt on the iPhone X is a security feature designed to confirm that you—not a background process or an accidental touch—are authorizing an app download. Because the iPhone X replaced the Home button with , Apple introduced this physical button press to provide a "handshake" before the camera scans your face. How to Use Double Click to Install how to download apps in iphone x double click
