OURA Gen3 Heritage Smart Ring - Size 6, Silver Wearable for Sleep, Heart Rate and Fitness Tracking Up to 7 Days Battery Life Compatible with iOS/Android Determine Your Before Purchasing

Determine size before purchase - Oura ring sizes are different from standard sizes. When you buy the Oura size sample set on Amazon, you will receive a credit of 10 EUR when you purchase the Oura ring on Amazon (Terms and Conditions apply) The groundbreaking smart ring - Track sleep, activity, stress, heart rate and more with an Oura membership. The first month is free, then it costs 5.99 EUR per month. Book your membership in the Oura app (not Amazon) Design for the highest accuracy - The finger allows the most accurate measurement of heart rate and thus highly personalised data on your health. Research-level sensors monitor over 20 biometric metrics Synchronise with your favourite apps - Oura is compatible with iOS and Android and offers integrations with more than 40 apps, including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava and many more Highest comfort in any life situation - The Oura ring made of titanium is durable, lighter than a wedding ring, anti-allergenic and waterproof. It is comfortable to wear and monitors your health 24/7 with the highest accuracy