  This paper describes the implementation of a crossplatform software
application to aid ambulance paramedics during CPR (Cardio-Pulmonary
Resuscitation). It must be able to work both on iOS and Android devices, which
are the leading platforms in the mobile industry. The goal of the application
is to guide paramedics in the different processes and expected medication to be
administered during a cardiac arrest, a scenario that is usually stressful and
fast-paced, thus prone to errors or distractions. The tool must provide timely
reminders of the different actions to be performed during a cardiac arrest, and
in an appropriate order, based on the results of the previous actions. A timer
function will also control the duration of each step of the CPR procedure. The
application is implemented in React Native which, using JavaScript as
programming language, allows to deploy applications that can run both in iOS
and Android native languages. Our solution could also serve as a record of
events that could be transmitted (even in real-time) to the hospital without
demanding explicit verbal communication of the procedures or medications
administered to the patient during the ambulance trip. This would provide even
higher efficiency in the process, and would allow automatic incorporation of
the events to the medical record of the patient as well.
