I tested the Oura Ring 4 for weeks - here's why it's the best health tracker right now

• The Oura Ring 4, the newest generation of the popular smart ring is now available to buy and starts at $350
• The Oura Ring 4 emphasizes a comfortable build with flatter and smarter sensors, more sizes, upgraded software, and an alleged eight-day battery life
• The eight-day battery life is actually more like five and a half days.

While Oura was quiet these past few years, in between the release of its Ring 3 in 2021 and the development of its Ring 4 (now available), a groundswell of competitors released smart rings of their own, from big-name brands like Samsung to indie upstarts like Ultrahuman. 

Also: The Oura Ring 4 has 4 features I'm especially excited about

The smart ring space is heating up, and we have officially reached peak health tech wearables. During the past few years, Oura has been busy developing a smart ring that's smarter and ...