The Oura Ring 4 also provides new features like real-time stress tracking, continuous heart-rate monitoring, and more precise temperature sensing. All of this is designed to give you more precise and helpful feedback during the day. The ring’s interior has also changed from an epoxy to all-over titanium for a lighter feel.

The Oura Ring 4 is our choice as the best smart ring, and its Brushed Silver variant is on sale for the first time during Amazon's Prime Day at 15% off.

Smartwatches aren’t for everyone. Maybe you don’t want to wear a screen-equipped gadget to bed, or you’re just after something that’s less obtrusive. Subtlety is where smart rings like the Oura Ring 4 shine, and Prime Day has knocked down its cost. It costs $296.65 ($52.35) from Amazon, which is both its best price and first significant discount.