Implementations disclosed herein involve first-party applications and first-party applications. An example method involves displaying, on a graphical display, an interface of a first application, where the interface of the first application comprises (i) an indication of one or more second applications and (ii) at least one first control for controlling playback on a media playback system. The method also involves detecting a selection of one of the one or more second applications. Based on detecting the selection of one of the one or more second applications, the method further involves executing the selected second application, where execution of the selected second application involves displaying, on the graphical display, an interface of the selected second application, where the interface of the selected second application includes at least one second control for controlling playback on the media playback system.