The Wearable Showdown: Oura Ring 5 vs. Fitbit Air vs. Whoop MG vs. Apple Watch • WSJ (opens in new tab)

Nicole Nguyen: What’s the best tracker? A fitness band? Smart ring? Smartwatch? Smart…shorts? There was only one way to find out: I wore them all at the same time. Trackers have really evolved, and beefed up on artificial intelligence. They can flag sleep apnea, predict illnesses—even act as contraception. Studies show that tracking activity does spur people to move more. But the data influx can create excessive worry or an unhealthy obsession with achieving perfect scores. I loaded up my lim...