The Chest Pain Score app is a smartphone calculator that supports diagnosis and treatment in healthcare, which is capable of generating an accurate percentage that predicts obstructive coronary artery disease in patients with acute chest pain. Thus this app was mainly designed for the use of physicians in the emergency department, and one should always seek a doctor’s advice in addition to using this app and before making any medical decisions.This App was designed to allow the physician to use a few patients information to quickly calculate a diagnosis probability, which is a very important feature for the emergency department. Furthermore, it is still possible to switch the language to English or Portuguese, making the app accessible to several countries.Thus, this App is a tool that applies statistics to predict obstructive coronary artery disease, being a facilitator for treatment and diagnosis in healthcare. It should not be used as a single diagnostic method since each clinical patient has their own individuality. We do not take any responsibility for the improper use of this App.