Justr investigates the phenomenon of compulsive smartphone behaviour. The concept focuses on the formation of habits and routines over long-term smartphone use and their impact on mental and physical health, as well as on the users' satisfaction. We believe that everyone should be able to decide for themselves which routines they internalise. Therefore, the approach of the concept is to transform problematic behavioural patterns in smartphone use into a long-term satisfying user experience through proven methods of behavioural psychology.