Embodiments of the present application relate to a method, apparatus, and system for processing an app. The method includes obtaining a plugin identifier, obtaining an app plugin installation package from a server, wherein the app plugin installation package is associated with the plugin identifier, installing the app plugin installation package, obtaining an app plugin lookup instruction associated with an app plugin, and determining the app plugin according to the app plugin lookup instruction, wherein the app plugin implements a specific function of a corresponding app in response to the app plugin being invoked.