Progressive Muscle Relaxation is a lifestyle and health & fitness app available on iPhone. Developed by Anke Moehlmann, this app offers various exercise forms of PMR. Users can choose between BEGINNER, ADVANCED, or EXPERIENCED modes and practice lying down or sitting. The app allows customization of volume for voice, music, and nature sounds, along with setting durations for tension and relaxation pauses. With a total of 12 complete versions of PMR, including Basic Form, Short Forms I and II, and Mental Form, users can effectively relax and manage stress. The app also offers music tracks, nature sounds, and timer functions for a personalized relaxation experience.