Ultrahuman Ring AIR - No App Subscription, Smart Ring, Size First with Sizing Kit, Sleep Tracker, Track Recovery, Fitness Tracker

A sizing kit will be shipped to you: Choose from the available 10 sizes. Ensure a snug fit of the Ring AIR.  Lock in your size: Log in to the Ultrahuman App with the same email as given during your purchase and submit your ring sizes.  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