1. A method, comprising: monitoring operations of a computer application program executing on a mobile device, among a plurality of mobile devices, using a monitoring code included in the computer application program that sends application performance events relating to the computer application program to a collection device, the application performance events include application performance data relating to the computer application program; receiving, by a server, application performance events from one or more collection devices; calculating, by the server, a user experience score using application performance data extracted from received application performance events associated with a particular computer application program; and causing display, by the server, of the user experience score or a representation of the user experience score.