Ein guter Tag hat 100 Punkte is a lifestyle app developed by informatik.tirol for Android devices. The app is designed to help users adopt a more environmentally friendly lifestyle and become politically active. The main goal of the app is to calculate the user's carbon footprint, with 100 points being the target. The app offers various challenges to help users reduce their carbon footprint and live a more sustainable life. Users can also join groups, exchange tips and support, and challenge their friends and family to become more environmentally conscious. The app also allows users to make political demands for climate protection to their politicians. However, the app may not be compatible with older Android devices, and users are advised to use the latest operating system.