The Yeti in us – An app to facilitate behaviour change step by step

I can’t change the world by myself. This is a common thought citizens share when it comes to climate action. Climate change campaigns usually aim at raising awareness and triggering action to reduce our footprint. However, these campaigns often fail as they are designed in a top-down manner. The ChallengeYeti app was created on a psychological-technological foundation focusing on motivational and bottom-up approaches to bridge this knowledge-action gap. Hence, the app primarily strives to trigger behavioral change in a fun and social way. This paper introduced the app and its functionalities, its theoretical and technical background, its implementation, its expected impact on behavioral change, and lastly, future challenges of the app.