User interface (“UI”) event data, including successful and unsuccessful touches, is accumulated and stored in a database. The data that is stored in the database typically includes the location on the display that the touch occurred and the application page with which the user was interacting. Subsequently, an analyst can query the database to determine a suitable data set for analysis. For a given application page, some sort of representation of the spatial distribution of previously logged UI events is generated and displayed. The spatial distribution representation can, for example, be a heat map, where regions having different densities of events are shaded with different colors.