Mappiness Screengrab (IMAGE) University of Sussex Caption The Mappiness app sporadically asks users to rate their levels of wellbeing using sliding scales. Over time, this builds up a comprehensive picture of when and where people are most happy. Credit Alex Bryson/George MacKerron Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.