Wearables have proven the value of tracking heart rate, activity, and sleep. Most of them, however, are placed on the wrist, creating a choice between analog timepiece and digital assistant. The Oura Ring provides a different option. Lighter than a traditional ring, the third-generation model can sense heart rate, temperature, and oxygen levels to track activity, fitness, and recovery, provide both info about and tips for improving or maintaining overall health. It lasts up to seven days per charge, is compatible with both Apple Health and Google Fit, is water resistant up to 100m, and has an outer shell made from lightweight titanium.