The app has been based on the 'cognitive shuffle' technique developed by Beaudoin through which users are prompted to imagine various objects or scenes in rapid succession.
"As you fall asleep, you tend to entertain various detached thoughts and images. The app gets users to think in a manner that, like sleep onset, is both visual and random. Brain areas involved in controlling sleep detect that sense-making has been suspended. This basically gives them an implicit license to continue the transition to sleep", Beaudoin said.