Both smartwatches are sleek and stylish, with circular watch faces and silicone wristbands. I tested the Garmin Venu 3S, with the ‘S’ indicating the smaller size (41mm), though there is a ...

Sometimes, your watch may not monitor blood oxygen throughout the night. Garmin notes that the Lily, vivosmart 4, and vivomove 3 and 3S will only monitor SpO2 across four hours of the sleep range ...

That said, it is compatible with Garmin’s quick-release bands, should you want to personalise it further. During this test, we were loaned a Venu 3S purely because the stock of the larger watch ...