CPR Timer is an iPhone app designed to assist users in maintaining the compression rhythm required during cardiopulmonary resuscitation (CPR). Developed in collaboration with paramedics facing situations where CPR is urgently needed without a defibrillator nearby, this tool offers crucial features to aid in such emergencies. Users can play, pause, stop, and reset the timer, choose between CPR with or without rescue breaths, set the compression rate, adjust the number of compressions before breaths, and customize various timing intervals. The app provides spoken warnings and visual cues to guide users through the CPR process effectively.

CPR Timer also offers in-app purchases for a logbook to record CPR sessions, real-time chest compression factor calculations, and access to the Pro Edition for additional functionalities. It is important to note that the app is not a substitute for medical equipment and should be used responsibly and at the user's own risk.