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Oura Ring 4 review: The lord of the smart rings

The Oura Ring 4 continues to outclass all other smart rings, but the gap isn't as wide anymore.

In fact, Oura also says the all-titanium design improves the ring sensor pathways, which means better accuracy and fewer "gaps" in heart rate or blood oxygen readings. (Image credit: Derrek Lee / Android Central)Comparing my sleep stages with my Pixel Watch 3, the results are more or less a match, with usually slightly shorter times on the ring. In addition to the already useful nudges the Oura app provides, Advisor can ping you with notifications at least once a day to check in, which I find to be a great motivator and a way to remind you about your progress.

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