Oura Ring 4, Silver ($349)
The Oura Ring is one of the most popular smart rings on the market. The Finnish brand offers six different colors (although these affect the price) and various sizes to ensure the perfect fit. Some of the Oura Ring 4's best features include improved sensor technology for more accurate data, skin temperature sensors that can detect when you're sick or drinking alcohol, resilience scores that measure how well you bounce back from intense workouts, menstrual cycle insights, and meal logging. Beyond these insights, Oura is perhaps best known for its exceptional sleep tracking. It displays your HRV balance, temperature changes while sleeping, blood oxygen levels, and the duration of each sleep stage. Just note that these features come at a cost. There's an annual $70 subscription fee (or $6 a month) to access the Oura app, where all of your data is stored. Still, it just might be worth the investment. "It's comfortable and easy to wear — you receive a kit to try on different sized rings to find your perfect match," our editor wrote in her full review. "The ring also tracks patterns over time, so you get a good sense of your typical heart rate, calorie burn, and sleep patterns. If you want to make a change, it becomes that much easier to pinpoint the problem with the Oura Ring."
