A portable apparatus comprising: a memory storing instructions; a display; and a control unit capable of executing said instructions to: send signals to display, for a user (Ua), on the display an augmented reality application that includes a first virtual image superimposed onto a representation (Im11 Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space being displayed on the display; send signals to identify a potential source of interest (12, 14) for the user, the potential source of interest (12, 14) being in the real space; send signals to monitor a user action, wherein the monitored user action comprises a series of actions; determine whether or not the user (Ua) is aware of the potential source of interest (12, 14) based on the monitored user action and by comparing a number of actions in the series of actions with a threshold number of user actions; determine whether or not the series of actions indicates that the user (Ua) has at least one of avoided the potential source of interest (12, 14) or approached the potential source of interest (12, 14); and send signals to notify the user of the potential source of interest (12, 14), wherein identifying a potential source of interest (12, 14) comprises analyzing input signals used to create the representation (Im11, Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space, and wherein identifying the potential source of interest (12, 14) is based in part on the monitored user action. a memory storing instructions; a display; and a control unit capable of executing said instructions to: send signals to display, for a user (Ua), on the display an augmented reality application that includes a first virtual image superimposed onto a representation (Im11 Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space being displayed on the display; send signals to identify a potential source of interest (12, 14) for the user, the potential source of interest (12, 14) being in the real space; send signals to monitor a user action, wherein the monitored user action comprises a series of actions; determine whether or not the user (Ua) is aware of the potential source of interest (12, 14) based on the monitored user action and by comparing a number of actions in the series of actions with a threshold number of user actions; determine whether or not the series of actions indicates that the user (Ua) has at least one of avoided the potential source of interest (12, 14) or approached the potential source of interest (12, 14); and send signals to notify the user of the potential source of interest (12, 14), wherein identifying a potential source of interest (12, 14) comprises analyzing input signals used to create the representation (Im11, Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space, and wherein identifying the potential source of interest (12, 14) is based in part on the monitored user action. send signals to display, for a user (Ua), on the display an augmented reality application that includes a first virtual image superimposed onto a representation (Im11 Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space being displayed on the display; send signals to identify a potential source of interest (12, 14) for the user, the potential source of interest (12, 14) being in the real space; send signals to monitor a user action, wherein the monitored user action comprises a series of actions; determine whether or not the user (Ua) is aware of the potential source of interest (12, 14) based on the monitored user action and by comparing a number of actions in the series of actions with a threshold number of user actions; determine whether or not the series of actions indicates that the user (Ua) has at least one of avoided the potential source of interest (12, 14) or approached the potential source of interest (12, 14); and send signals to notify the user of the potential source of interest (12, 14), wherein identifying a potential source of interest (12, 14) comprises analyzing input signals used to create the representation (Im11, Im12, Im21, Im22, Im31, Im32, Im41, Im42) of real space, and wherein identifying the potential source of interest (12, 14) is based in part on the monitored user action.