Apparatus and method for automatic analysis of the use of an application user interface

A device (D) is dedicated to the analysis of the use by at least one of at least one user interface (GUI) associated with an application (AP). This device (D) comprises analysis means (MA) arranged to compare the first data representative of the first actions performed by the user through the user interface (GUI) to perform the tasks required by the application (AP ) associated with second data representative of a second action would have had to make this user through the user interface (GUI) to perform these tasks required, and third data representative of how this user should have made these seconds actions to determine potential differences representative of inadequacies of this user interface (GUI).