Sleep trackers use your resting heart rate, heart rate variability and breathing data to estimate how long you sleep and how much time you spend in each stage.

Whether it’s from Apple, Garmin, or Google, we’re covering everything from sleek, budget-friendly models to devices loved by ...

Save $44.76 on the Oura Ring Gen3 Horizon Stealth, a premium smart ring that tracks sleep and biometrics with medical-grade accuracy.

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Plus: Proton helped the FBI identify a protester, the Leakbase cybercrime forum was busted in an international operation, and more.