A method for provisioning a group of devices with control-group data defining one or more functional interrelationships between the devices. The method includes providing a GUI defining an online application marketplace, the GUI specifying multiple applications available for download, each application including a different respective set of control-group data defining a different respective set of one or more functional interrelationships. Further, the method includes receiving user input selecting a given one of the applications, the selected application defining given control-group data defining a given set of one or more functional interrelationships. And the method includes responsively (i) downloading the selected application and (ii) provisioning the devices of the group with the given set of control-group data, the provisioning establishing the given set of one or more functional interrelationships between the devices of the group.