Within the app, users are presented with a live feed if the viewfinder with a
graphical overlay - a vertical line with a scale at the side and options to exit the app or take a photo at the top and bottom. The vertical line moves up and down the screen dependent on the signal from the EEG monitor, with higher levels of
brain waves associated with
concentration moving the bar towards the top, and higher levels of brain waves associated with
relaxation moving the bar towards the bottom. Once concentration levels get high enough, the camera captures a picture and the image remains on screen with the bar moving to allow the user to share to Twitter with a positive response, or discard the photo with a negative response. == Possible uses ==