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Your Oura Ring can’t measure what’s going on in your skull

Sleep trackers detect sleep via a combination of motion, heart rate, and temperature sensors. This is Optimizer, a weekly newsletter sent from Verge senior reviewer Victoria Song that dissects and discusses the latest gizmos and potions that swear they're going to change your life. Opt in for Optimizer here. Oura's getting sued. A recently filed class-action complaint against the smart ring maker alleges that the…