The document introduces the CLAS App, a mobile application designed to standardize and improve handover communication between hospitals and general practitioners. It was developed based on the Cork Letter-Writing Assessment Scale (CLAS), a 50-item rating scale for evaluating the quality of hospital discharge letters. The CLAS App implements the CLAS checklist digitally to provide doctors a reference for writing discharge letters and to support the handover process. It aims to improve information transfer during handovers by helping ensure discharge letters include all essential details.