The Oura Ring 4 is one of the sleekest fitness trackers I've reviewed. It's a top pick for all but the most serious athletes.
RingConn's new flagship has two cool new features and plenty of spec bumps. Here's my first impressions of it from the CES ...
On paper, at least, Aivela is giving the smart ring category a different spin, shifting it from passive health tracking toward more active control.
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