5 million people die from sudden cardiac arrest every year. And when it happens, minutes matter. Getting early and quality CPR is key for a high survival rate. RevivR seeks to train the general population with this life saving skill, through a low-effort, cost-efficient, and easily accessible digital training solution. The training prepares lay people to call for help, perform CPR, and use an AED. All that is needed is a phone, a pillow and no more than 15 minutes.