In honor of Prime Day, Amazon is going against the norm with the first-ever price cut on Oura Ring 4: With a 15% reduction on all sizes, you can now buy the Oura Ring 4 in silver, size 10, for $297 from $349. Other sizes are also on sale, but some of them are already sold out.

If a smart watch just isn't the right fit for you, you can check out the Oura Ring in its latest iteration. And get it on sale for Prime Day.

First things first: the Oura Ring is (obviously) a ring, whereas the WHOOP is a small, flat device that you wear on a wrist band. Each connects to a respective app where you can see the data that the device gathers throughout the day.