A method implemented by an application (app) store system for providing apps to one or more users through a network, the method comprising managing, by the app store system, a multi-screen application (MSA) package that comprises a set of related apps, wherein one or more relationships among the set of related apps are pre-defined, receiving, by the app store system, a request from a first user device via the network to download at least part of the MSA package; and causing, by the app store system, the set of related apps to be downloaded to a plurality of user devices including the first user device according to the one or more relationships among the set of related apps in response to the request.