GuardiApp is a mobile application aimed at medical professionals with the aim of being a help tool during their assistance activity in the guards or in the plant pass. It is developed by a group of residents and young internists of the Society Spanish of Internal Medicine (SEMI) with the endorsement of the Training Group of the SEMI. GuardiAPP presents two major sections: 1. Pathologies: more than 130 topics in which they are described simply and schematically the clinic, tests and diagnostic explorations and treatments of the main pathologies that we find in a medical guard. 2. Tools: 34 tools in which we find the main scales and calculators commonly used in clinical practice, as well as a tool for calculation of perfusions of the main drugs (noradranaline, dobutamine, nitroglycerin, ...). In short, it is a complete and simple application that responds to the needs of during the care of medical patients.