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Oura Ring

Editor's pick

A titanium smart ring that tracks sleep stages, heart-rate variability, temperature, and readiness with best-in-class accuracy — and none of a smartwatch's bulk. Ring purchase plus a monthly membership for full insights.

Eight Sleep

A smart mattress cover that heats or cools each side of the bed through the night, adjusting automatically from your sleep data. Consistently the most-cited sleep upgrade in the longevity crowd.

Levels

Continuous glucose monitoring for metabolic health: CGM sensors plus an app that scores how your meals, sleep, and workouts move your blood sugar — turning metabolic health into a feedback loop.