Evaluating user experience for an application includes collecting, for each of a plurality of user sessions, a list of user event data items experienced from a perspective of a user device during that user session. For each user session, a session score is discerned based on an analysis of that user session's list of user event data items. Each session score is associated with a corresponding one of the plurality of users. For each of a plurality of successive time periods, user scores are discerned for each of the plurality of users. Each user score is discerned as a function of all session scores associated with that user where those session scores are for user sessions occurring during that time period. For each of the successive time periods, a period score is discerned as a function of the user scores discerned for that time period. The time period score discerned for a selected one of the successive time periods can be reported.