The ultimate goals of preoperative medical assessment are to reduce the patient’s surgical and anesthetic perioperative morbidity or mortality, and to return him to desirable functioning as quickly as possible. It is imperative to realize that "perioperative" risk is multifactorial and a function of the preoperative medical condition of the patient, the invasiveness of the surgical procedure and the type of anesthetic administered. This App calculate the cardiopulmonary risk index score. Based on the predicted probability associated with various scores, patients were categorized into five risk classes.