Tranquility is an app that allows parents and guardians of infants and young children to monitor their child’s heartrate with a registered bracelet. The app includes a role for the parents and a role for the child’s physician. The physician can set his or her patients’ recomended heart rate threshold, and the parent is notified when their child’s heart rate is out of the set range. Seamless communication between physician and parent and 24/7 monitoring provides new parents and caretakers peace of mind while protecting the health and well being of their children.