1. A method, comprising: at a first computing device with a display, one or more processors, and memory: displaying, on the display, a user interface for an analyst application; displaying, in the user interface for the analyst application, a representation of a first user interface for a first application; retrieving previously stored user interface touch event data for the first user interface for the first application, wherein: the previously stored user interface touch event data include respective locations in the first user interface where respective touch events occurred; displaying, in the analyst application overlaid on the representation of the first user interface for the first application, a first spatial density distribution of touch events that corresponds to the retrieved user interface touch event data for the first user interface for the first application; detecting activation of a representation of a first user interface element displayed in the representation of the first user interface for the first application, wherein at least a portion of the first spatial density distribution of touch event is overlaid on the representation of the first user interface element; and, in response to detecting activation of the representation of the first user interface element displayed in the representation of the first user interface for the first application, concurrently displaying, in the user interface for the analyst application: a representation of a second user interface for the first application, and a second spatial density distribution of touch events that corresponds to the second user interface for the first application, wherein: the second spatial density distribution of touch events is overlaid on the representation of the second user interface for the first application, the second user interface is distinct from the first user interface, and the second spatial density distribution of touch events is distinct from the first density distribution of touch events.