Abstract: A smart phone used by an end user includes a positioning circuit; a computer readable memory; and an app resident on the computer readable memory. The app is configured to cause the positioning circuit periodically to determine a preferred location of the smart phone and transmit the preferred location to a remote server via a network. The app executes a plurality of local rules based on the preferred location and receives location-specific content that is selected based on the preferred location from the server via the network. The location-specific content is presented to the end user. A software development kit for generating a smart phone app facilitates quick app generation.