An application launching user interface that includes a plurality of application icons for launching corresponding applications is displayed. A first touch input is detected on a first application icon of the plurality of application icons. The first application icon is for launching a first application that is associated with one or more corresponding quick actions. If the first touch input meets one or more application-launch criteria which require that the first touch input has ended without having met a first input threshold, the first application is launched in response to the first touch input. If the first touch input meets one or more quick-action-display criteria which require that the first touch input meets the first input threshold, one or more quick action objects associated with the first application are concurrently displayed along with the first application icon without launching the first application, in response to the first touch input.