Sleep Index is derived to help you understand the various sleep stages such as Deep sleep, REM sleep, Light sleep and being Awake. During different stages of sleep, different metabolic processes of the body occur for growth, repair, restoration, and maintenance. Movement Index is designed to help you move across the day enabling better metabolism and cardiovascular functioning. Track your steps, calories, metabolic equivalents (METs) and more. Recovery Score provides insights into various signals your body sends throughout the day, enabling a deeper comprehension of its needs. It is derived from a blend of key metrics, including Heart Rate Variability (HRV), Heart Rate, and Skin Temperature, interpreting the signals your body sends and enabling you to monitor your overall well-being. Workout tracking: The Ultrahuman Ring AIR has a dedicated Workout Mode that tracks various activities, giving you deeper insight into your overall workout metrics. By tracking heart rate during workouts, users can gain insights into their cardiovascular response, track intensity levels, and make informed decisions to improve their fitness outcomes. Stimulant window recommender: A game changer for all caffeine enthusiasts, helping you to make smart choices about your stimulant consumption. It breaks down your day into favourable times in which you can use stimulants to enhance your productivity.