Systems, apparatus, and methods for managing an application installed on a mobile device, such as a mobile phone are provided, so as to prevent or limit unauthorized use of the application, for example, when the mobile device is lost, stolen, or otherwise subject to unauthorized use. A request to enable or disable user access to a function of the application can be received by a server computer. A command message responsive to the request can be generated by the server computer, the command message comprising control data for enabling or disabling user access to the function of the application. The generated command message can be transmitted to the mobile device over a wireless network.