Image: Oura
Overview
The Oura Ring 4 features an 18-path Smart Sensing system for more accurate health tracking, improved sleep analysis, and a slimmer titanium design.
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Description
The fourth generation Oura Ring represents the most significant hardware upgrade in the company's history. The new Smart Sensing technology uses 18 signal pathways that automatically adjust to skin tone and finger anatomy for more accurate readings. Sleep tracking accuracy has improved significantly, with studies showing 79% four-stage sleep agreement. The ring is now available in more sizes and finishes, including a new ceramic collection.
What Critics Say
"The best smart ring on the market. More comfortable and useful than Ring 3, though activity tracking can be problematic with false workout detection."
Read full review"Users praise exceptional customer support, AI chatbot efficiency, and health insights. Concerns include battery longevity, hidden subscription costs, and return policy fees."
Read full review"Reddit users love the battery life, sleep tracking accuracy, and comfortable design. Frustrations with workout tracking accuracy, subscription model, and durability concerns."
Read full review"The Oura Ring 4 is the new gold standard for smart rings with its comfortable all-titanium design, comprehensive app, and longer battery life."
Read full review"A future-proof smart ring that is gorgeously designed, easy to wear, and full of granular health information. Named Health and Fitness Device of the Year 2025."
Read full review"Still on top—for now. The Oura Ring 4 extends the company's lead with an all-titanium design and 18-path Smart Sensing, but subscription remains the biggest downside."
Read full review"Many software and hardware updates make it more accurate, useful, and easier to wear than the Ring 3. Sensors are now inset inside the titanium body."
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