EVAN2 is a user-friendly tablet App tailored to medical professionals for preoperative evaluation and monitoring of surgical patients. EVAN2 provides complete medical records and summarizes assorted evaluation sheets all in one App. During the surgery, EVAN2 helps doctors to keep track of the surgery progress and real-time vital signs such as heart rates and blood pressures. Unlike traditional hospital information system, EVAN2 is a professional medical App with clean and logical design to improve working efficiency and patient safety. It is a collaborative product of designers and medical professionals, sets a new frontier to medical App.