Does it work with Android phones?

No. It is built for iPhone only, so Android users should look at Oura or Ultrahuman instead.

Yes. It is rated 5 ATM, which covers swimming and showering. Avoid hot tubs and deep diving.

Does it track blood oxygen?

Yes, it measures SpO2, mainly during sleep. Treat the readings as trends, not medical results.

No subscription is required for the core sleep and heart rate tracking. Check the app for any optional paid features.

Use the sizing kit before ordering and wear the sample for a day. A loose ring gives poor heart rate and SpO2 readings.

No. It has no GPS, so outdoor runs and rides need your phone for distance and route.

At Best Buy, for $99.00, as of our latest check.

2 stores we checked sell it, including Shop Simon, Best Buy.

$99.00at Best BuyChecked Nov 9

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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