Oura is the creator of the revolutionary smart ring— Oura Ring — and the Oura App, a world-class personal health platform. Together, the Oura Ring and Oura App work hand-in-hand to provide members with accurate and personalized daily health data, insights, and guidance. Oura Ring is sleek, accurate, and comfortable — it tracks your sleep, activity, and recovery and so much more with advanced sensor technology and up to 7 days battery life. The Oura Membership is always improving with new features and product updates that make tracking your health more personal than ever. New members get the first month of Oura Membership free, then it’s $5.99 per month. Register for Oura Membership on the Oura App. Oura Membership is not sold on Amazon. Oura Ring is FSA/HSA Eligible — we can accept FSA or HSA funds for the following: Oura Ring, additional chargers, and shipping. IMPORTANT: Size yourself with the Oura Ring Sizing Kit before you buy — Oura Rings are not US standard sizing, and finding the right size will result in the best experience possible. With a purchase of the Gen3 sizing kit on Amazon, a $10 credit will automatically be applied to your Gen3 Oura Ring or Oura Ring Charger at checkout (terms and conditions apply).