The Oura Ring 4 will cost $349 for Silver or Black, $399 for Brushed Silver or Stealth, or $499 for Gold or Rose Gold. In ...
Oura Ring 4 continuously tracks your sleep, activity, and health with the same form factor as a regular ring. The ring is comfortable, wearable during activities in and out of water, durable, and ...
19don MSN
Luna Smart Ring Gen 2 review: This Oura ring alternative has great battery life and sleep analytics
Could Luna beat Oura at the smart ring game?
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