Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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A black smart ring with a built-in heart rate monitor and sleep tracking, rated IP68 for water resistance and paired with an iPhone. It is the basic, no-frills version of the category: it tracks sleep and pulse but has no display and no GPS. Compared with name-brand rings like Oura and Ultrahuman, it offers fewer sensors and no subscription ecosystem, so it suits someone who wants simple overnight and resting heart rate data without a monthly plan. Expect ring-style comfort and all-day wear, but check the sizing and the companion app before committing.
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Lowest price we've seen: $129.99 on Nov 10 at Best Buy. Tracked across 2 stores since Nov 10.