Compiled code is stored on a mobile device or embedded in an application on the device. Instructions are assembled in a compiled program and stored on a system for subsequent transmission to the mobile device over a network. An application on the mobile device interfaces with the network to request and receive instructions. The instructions are retrieved from the data store and returned over the connection to the mobile device. After receipt by the mobile device, the instructions determine which code is to be activated. New instructions are downloaded to the device and the new instructions activate different code.