Mobile device application analysis

A mobile telecommunications device runs a plurality of applications installed on the device (for providing services to the device user). Monitoring means monitors the performance of the applications for generating performance data (for each application), and analyzing means analyzes the performance data (for each application) and to identify characteristics of the applications in dependence thereon. The mobile device may alert a user of the device of the problematic ones of the applications (for example via the GUI of the device). A mobile telecommunications device application performance analyzing apparatus may be coupled to the mobile telecommunications network that provides mobile telecommunications services to a plurality of mobile telecommunications devices and may receive the performance data and which includes analysis means for conducting analysis of the performance data to identify characteristics of the applications in dependence thereon.