Every day, thousands of cars congest Swiss city centres and motorways – a tedious situation for motorists and a huge problem for our climate. Mobility accounts for approximately one third of Switzerland's energy consumption and is therefore also the source of a large proportion of CO2 emissions. The potential for savings in this area is significant, but in general individuals are not willing to change their mobility behaviour. Researchers at the University of Applied Sciences and Arts of Southern Switzerland (SUPSI) and the ETH Zurich therefore aimed to determine how Swiss people can be persuaded to leave their vehicles in the car park more often and to switch to other, more sustainable means of transport. For this purpose, they developed the GoEco! app, which records users' mobility habits, suggests ways to improve their behaviour and offers them the opportunity to compete with other users. The aim of the app is to induce a long-term change in users' behaviour, leading to more sustainable and climate-friendlier travel.