... to choose an "audience winner" from all the projects via online voting. This year's most popular winner is the smartphone-based first aid system 'Mobile Retter': the idea for this app came from emergency physician Dr. Ralf Stroop. Volunteers with experience in first aid - such as doctors, nurses or paramedics - can register. If an emergency call is made in their vicinity via 112, they are located via their smartphone, alerted and directed to the scene of the accident. This means that the time until the ambulance arrives is not wasted and lives can be saved.