I convinced my mom to buy an Oura Ring - my biggest regret is not buying at this price

The Oura Ring 4 has remained at the top of my list of best smart rings for several years. Ahead of Black Friday, it's on sale for its lowest price yet.

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As a tech reviewer and writer, I test out lots of technology each week. While I can normally designate a product's use for a specific person or group, it's much harder to recommend the product to most people, a qualifier I use only in rare instances. 

The Oura Ring 4, however, is one of those products I have recommended to anybody who asks me about my favorite technology. It's so good I have even told my own mother, one of the more critical people I know, to buy one for herself. 

Also: The best Black Friday deals live now

The main reasons ...