Abstract: A technology is disclosed for the efficient capturing of monitoring data capable to reconstruct the experience of a user during the interaction with an application on a mobile device. The proposed approach uses instrumentation to detect the occurrence of events that change the user interface of the monitored application and that, in response to such an event, identifies the fraction of the user interface that was altered by the event and then captures only the changed portion of the user interface display. Additionally, privacy configuration data is evaluated during the capturing process to identify portions of the user interface that contain data that is protected due to privacy policy settings. In case an event changes such a privacy protected user interface portion, only the occurrence of the event and the affected screen area are captured, but no actual display data.