Portions of an application can be delivered through a network without having to download the entire application. When an application is installed, HTML, CSS and JavaScripts® or other User Interface (UI) files can be copied into local cache. A version number can also be stored with this code, so that when the application is launched, a web service checks the latest version on a server computer. If the latest version differs from the cached version, then an update is needed. New UI files can then be downloaded to the local cache. The local cache can be a folder that is used by the application, wherein the folder is stored on a hard drive of the client device. Binaries associated with the application can be stored in a different folder.