World's lightest sleep tracking wearable With the Ring AIR's advanced sensors and seamless integration with the Ultrahuman app, you can measure and optimise your health, movement, recovery, and sleep like never before. More accurate from the Finger than the Wrist The finger, with its higher perfusion index and arterioles, serves as a richer and more accurate source of biomarker information. Sleep Index Get a deeper understanding of your sleep quality and quantity through metrics such as sleep duration, RHR, restfulness, sleep stages such as REM, Deep and light sleep. Movement Index Meticulously designed to help you get more all day movement for optimum energy metabolism. Track steps, workout, and calories to get an insight into your all day movement. Zones Designed to harness the power of community, a platform to share movement, sleep and recovery scores with your friends or your family. Create a private group, invite your loved ones, and start flexing those scores. Adenosine Clearance Window Optimise your stimulant consumption such as caffeine for enhanced productivity and sleep management. Circadian Phase Alignment Understand the intricate interplay between a stimulus such as light exposure, food, or exercise mapped to a shift in your body's circadian rhythm. Recovery Score The score helps you comprehend body metrics such as stress using body signals such as heart rate, HRV and skin temperature so you know when to push and when to pause. Smart Goals Smart Goals empower you to navigate this journey with precision and personalisation. It helps you master key indicators such as your sleep and wake timings, movement throughout the day, your active minutes, your sleep duration and much more. Women's health Ring AIR provides personalised insights to women into each phase of their menstrual cycle, correlating it with different biomarkers. It allows women to understand how each menstrual phase affects their resting heart rate, heart rate variability, and temperature. Integrations with HealthConnect and HealthKit With the integration of Apple HealthKit and Android Health Connect, you will have access to more data-sharing capabilities including sleep, steps, calories burnt, and standing hours. Workout mode By tracking heart rate during workouts, you get access to insights into your cardiovascular response, track intensity levels, and make informed decisions to improve your fitness outcomes.