The Oura Ring 4 is no longer a niche product. Smart ring shipments jumped 49% in 2025, according to IDC data, far outpacing the 6% growth recorded by smartwatches. ŌURA sits at the center of that shift, and the Ring 4 is the device driving it.
This is a titanium ring that tracks over 50 health metrics continuously, costs $349 to start, and requires a $5.99 per month membership after the first free month. Understanding what you get for that price is what this article covers.
The Sensor Setup:
The Ring 4 uses an 18-path multi-wavelength photoplethysmography system, compared to just 8 paths in the previous generation. In practice, this means the ring selects the most accurate signal path in real time, which directly reduces data gaps, especially during sleep.
Sensors measure resting heart rate, heart rate variability, blood oxygen, skin temperature variation, and respiration rate, all continuously. The sensors are now recessed and flush against the inner surface, making the ring considerably more comfortable to wear around the clock.
Battery and Build:
Titanium is used for both the inner and outer shell, which makes the ring durable and non-allergenic. The Stealth finish uses a Diamond-like Carbon coating that adds scratch resistance. Battery life sits at 5 to 8 days depending on ring size and settings, and the ring takes up to 120 minutes for a full charge.
Water resistance is rated to 100 meters, so swimming, showering, and saunas are all fine. Sizes run from 4 to 15, which is the widest range available in the smart ring category right now.
What the App Tracks:
The Oura app organizes data into three tabs: Today, Vitals, and My Health. Daily scores for Sleep, Readiness, and Activity give you a quick overview. The Vitals tab shows continuous metrics like resting heart rate and daytime stress levels, while My Health builds a longer-term picture including Cardiovascular Age.
A feature worth knowing about for those researching sleep tracking wearables is Cycle Insights, which now includes a Fertile Window estimate. For users managing their menstrual health or family planning, this adds genuine practical value to the platform.
New in 2025 and 2026:
In October 2025, ŌURA launched the Ring 4 Ceramic collection in four colors, a portable charging case priced at $99, and multi-ring support, allowing users to switch between multiple Ring 4 devices on a single account.
Health Panels, priced at $99 and HSA or FSA eligible in the US, let members schedule lab tests and view results directly inside the Oura app, paired with dietary recommendations. This is a meaningful step toward integrating consumer wearable data with actual clinical data.
Activity tracking also improved significantly. Automatic Activity Detection now runs 24 hours a day, step counting uses a more advanced machine learning model for better pedometer accuracy, and heart rate data from Apple Health, Strava, and Android Health Connect now feeds into the Oura app.
ŌURA also became the Official Wearable of Team USA and the LA28 Olympic and Paralympic Games, supporting athletes across both the 2026 and 2028 Games.
Pricing Breakdown:
The titanium Ring 4 starts at $349. The Ceramic version goes up to $499 depending on color. The membership costs $5.99 per month, or $69.99 per year. The first month is free for new members.
The ring itself is HSA and FSA eligible in the US, which is a meaningful detail for buyers thinking about out-of-pocket costs. For anyone comparing options in the smart ring health tracker space, you can also explore how Oura compares to competing devices like the Samsung Galaxy Ring.
Who Gets the Most Value:
The Ring 4 is a strong fit for people who want continuous health data without wearing a watch. Sleep quality, recovery metrics, stress patterns, and long-term cardiovascular trends are where the platform genuinely delivers.
Power users who want granular control over each data category will find the app well-structured. The data is detailed without being overwhelming, largely because the scoring system gives you a starting point before you dig deeper.
The Oura Ring 4 is one of the most thoroughly validated consumer health wearables available in 2026. It tracks what it promises, its accuracy has been independently tested by institutions including the University of Tokyo and the National University of Singapore, and the platform continues to expand meaningfully.
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