Code Blue is a specialized stopwatch application that allows you to record the actions that take place during a cardiopulmonary event.
As seen in the Journal of Emergency Medical Services, February 2016 issue - "...an easy-to-use smartphone app that keeps track of key CPR events."
This application was made for medical professionals to keep track of key events during the management of a cardiac arrest.
This application is not a guide, nor does it replace the training and experience required to manage a cardiac arrest.