Smart rings are all the rage. The finger-worn bits of tech might look like sparkly jewellery, but they can track everything from sleep and workouts to heart rate and stress, all without needing a smartwatch or fitness tracker strapped to your wrist.
The only problem? The best smart rings don’t come cheap. Thankfully, Amazon’s Prime Day sale has brought prices crashing down, with discounts on some of my favourite wearables, including the Oura ring 4 and Ultrahuman ring air.
