Unimpressive workout tracking Fitness trackers have become a lot more attractive over the years, but no matter the design, they tend to stick out. If you're looking for a more discreet alternative that's comfortable to wear 24/7, you might be interested in the Oura Ring (starting at $299). It looks like jewelry at a glance, but the Oura is far smarter than your average ring. This water-resistant wearable features heart rate, respiration, and body temperature sensors, as well as a 3D accelerometer to measure your activity, sleep, and recovery, and it works with a companion app to help make sense of your data and offer insights to foster healthy habits. The Oura's ability to track workouts is pretty basic compared with a wrist-worn model, but it offers comprehensive sleep tracking and is more comfortable to wear to bed than a watch or wristband, making it an intriguing alternative.