1. A system for assessing a value of a first application with respect to a use of a first mobile communication device, the system comprising at least one computer server in communication with the first mobile communication device via a network and at least a second communication device in communication with the first mobile communication device via the network, wherein the server is configured to: detect a use of the first mobile communication device with respect to the second communication device, wherein the detected use includes a use of the first application and a communication with the second communication device; assign at least a first proximity value to the detected use of the first mobile communication device with respect to the second communication device and the use of the first application; use the assigned at least first proximity value to determine an impact of the detected use of the first application upon the detected use of the first mobile communication device; and use the determined impact to assess a value of the detected use of the first application with respect to the detected use of the first mobile communication device.