Oura Black Friday deals: Get up to 30 percent off smart rings right now

Smart rings are becoming more ubiquitous and a more subtle way to track your everyday activity than fitness trackers or smartwatches. For Black Friday, you can save on Oura ring models. Arguably the most noteworthy deal is on the Oura Ring 4, the latest model, which is down to $249.

The Ring 4 actually topped our list of the best smart rings, and with good reason. It's comfortable to wear for long periods of time, which is always nice. It's a visually striking ring. We also appreciated the size options, as it fits fingers from size 4 to 15.

As for functionality, this smart ring tracks a number of health and fitness metrics. The affiliated app will send out notifications when it thinks you need a rest or to remind you to exercise. It keeps an eye on sleep, heart rate, stress, body temperature, menstrual cycle ...