The Oura Ring 3 just dropped to its lowest price ever

Ahead of Black Friday, the Heritage and Horizon Oura Ring is on sale on Amazon and on Oura's website for a limited time. The discount varies by ring finish and size, ranging from $50 to $200. It is a notably rare discount on a product that doesn't go on sale often. The deal comes after Oura launched its fourth-generation smart ring, the Oura Ring 4. 

Also: The best Black Friday deals live now

ZDNET's key takeaways 

• The Oura Ring is the most competitive smart ring on the market, starting at $249 (on sale) with a $6-per-month subscription. 
• A phenomenal app experience, great health data visualization, sleep-tracking capabilities, and cross-platform integrations make this smart ring the one to beat.
• The monthly subscription is a grievance among wearers, and the battery life tends to wither over time.

If you've heard of smart rings, chances are ...