How it works
Smart ring technology.
Smart rings combine compact sensors, Bluetooth connectivity and a companion phone app. Features differ by model, so the individual product page is the source of truth.
Sensors and estimates
Depending on the ring, supplier-listed features can include steps, sleep, heart-rate and blood-oxygen trends. These readings are wellness estimates, not medical measurements.
Phone compatibility
The ring usually syncs through a model-specific app. Check the product page for the exact app and supported phone requirements before ordering.
Battery and water
Runtime and water-resistance ratings vary. Only rely on the exact figures shown for that model, and keep any unrated ring away from showers, swimming, steam and hot water.