An electronic device is configured to receive a first request to display a user interface of a first third-party application on a respective display that is in communication with the device. The device is further configured to, in response to receiving the request, obtain a first user-interface template configured to be used by a plurality of third-party applications, and request, from the first application, one or more values for populating the first template. The device is also configured to receive, from the first application, while the first application is running on the device, a first set of values for populating the first template; populate the first template with the first set of values; generate a first user interface for the first application using the first template populated with the first set of values; and send information to the respective display that enables the first user interface to be displayed.