David Grüning, M.Sc., is a researcher at the Department of Psychology at Heidelberg University and GESIS - Leibniz Institute for the Social Sciences. He is also the lead scientist of one sec and Chair of the Science Board at Prosocial Design Network. His current research focuses on developing digital and app-based interventions to apply psychological mechanisms in online-environments. We discuss his recent article in the Proceedings of the National Academic of Sciences on reducing automatic smartphone consumption by nudging using the app One Sec.