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.
Reviewed
▲ 1
Jun 18, 2026
Independent health service index / 2026
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2 services matching “sleep-tracking”
A featherweight titanium smart ring (2.4–3.6 g) tracking sleep, recovery, HRV, and temperature — with every feature included in the $349 purchase and no subscription, the direct counterpoint to membership-model rings. 4–6 day battery, 10 ATM water resistance.
Reviewed
▲ 2
Sep 4, 2026