Copenhagen Paediatric Emergency (CoPE) App is developed with the intent of preparing the clinician in the management of acute life threatening conditions in the paediatric patient population. By simply dialing up a weight and age, the corresponding desired guide sheet is displayed by tapping OK. CoPE App consists of 31 guide sheets, corresponding to one guide sheet per kilogram bodyweight, ranging from newborn (3 kg) until 10 years of age (33 kg). Information on normal physiological values, recommended equipment used during initial A-B-C stabilization, recommended drugs and doses and fluid boli are provided. Newborn Life Support and Paediatric Advanced Life Support guidelines from European Resuscitation Council are available for fast reference. CoPE is developed by senior consultant paediatric anaesthesiologist Morten Bøttger and senior consultant anaesthesiologist Michael Friis Tvede, Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, Copenhagen, Denmark. CoPE is an international (English) and updated version of the Danish app Akut Barn, generously supported by The TrygFonden Foundation and originally launched in 2012.