The Oura Ring is a smart ring designed to track sleep and physical activity. It is manufactured by Oura Health Ltd., a Finnish health technology company founded in 2013. The company's headquarters are located in Oulu, Finland, with additional locations in Helsinki and San Francisco. The Oura Ring is crafted with precision in Finland, using primarily titanium. As of December 2024, Oura Health had sold 2.5 million Oura Rings. By September 2025, that number had increased to 5.5 million.
The Oura Ring 4 is the latest iteration, featuring more precise sensors, improved battery life, and a more comfortable design. It monitors key body metrics such as body temperature, heart rate, sleep stages, and activity levels. The Oura Ring 4 uses "Smart Sensing technology" to adapt measurements to the wearer. Data is presented through the Oura app, which provides insights and advice on improving daily routines. The battery can last up to 8 days on a single charge. As of February 2026, the Oura Ring 4 starts at $349. Prices can reach up to $499 for ceramic versions. A monthly or yearly subscription is required for full access to the app's features, costing $5.99 per month or $69.99 per year. The Oura Ring 4 is available on Oura's website, Amazon, and Best Buy.