Oura Ring 5 Shrinks the Hardware, Not the Ambition: A Deep Dive into the Latest Iteration
Table of Contents
The Quest for the Invisible Wearable
For years, the central tension in the smart ring market has been the trade-off between sensor capability and physical comfort. The Oura Ring 4 was a step in the right direction, but the newly released Oura Ring 5 attempts to solve the ‘chunkiness’ problem that has plagued the category. By slashing the ring’s width from 6.09 mm to 2.28 mm, Oura has produced a device that is 40% smaller than its predecessor, moving closer to the feel of a traditional piece of jewelry than a piece of medical hardware.
This reduction in scale isn’t just aesthetic. For users who found the Gen 4 created an uncomfortable gap between the index and middle fingers, the Gen 5 offers a seamless fit. The weight reduction is equally stark; depending on the size, the Gen 5 weighs between 2.0 and 2.68 g, nearly half the weight of some Gen 4 configurations. To protect this smaller frame, Oura has implemented a physical vapor deposition (PVD) coating, which aims to mitigate the scratching and wear-and-tear that often makes smart rings look aged after six months of daily use.
Smarter Sensors, Fewer Pathways
On paper, the Oura Ring 5 appears to do more with less. It utilizes 12 light pathways, a decrease from the 18 found in the Gen 4. While a reduction in sensors might normally signal a downgrade, Oura claims the redesign utilizes brighter LEDs and more efficient pathways. The company asserts that the resulting pulse signal is 100 times stronger than typical wrist-based wearables and offers improved accuracy across a wider range of skin tones.
From a technical standpoint, the claims are ambitious. Oura reports a 99% heart rate accuracy when compared to medical-grade ECGs and 95% accuracy in sleep-staging against clinical data. While these figures are provided by the company rather than independent third-party labs, the focus on HRV (heart rate variability) and sleep architecture remains the core value proposition for the power user.
The Battery Gap
The most tangible improvement for the average user is the battery life. While the Gen 4 was rated for five to eight days, real-world usage often saw it dip to four days. The Gen 5 extends this window, with a reported 6 to 9-day lifespan. In practical testing, the device loses roughly 15% of its charge per day, comfortably pushing the interval to a full week.
To further solve the charging friction, Oura has introduced an optional $99 charging case. Constructed from recycled aluminum, the matchbox-sized case can hold approximately a month’s worth of power, making it an essential accessory for frequent travelers who want to avoid carrying proprietary cables.
Sizing and Price Friction
The smaller profile of the Gen 5 necessitates a new sizing conversation. Because the ring is thinner, it interacts with the finger differently. While some users may find their Gen 4 size still works, others may find the Gen 5 feels slightly tighter. Oura is strongly recommending the use of their free sizing kit for 24 hours to account for natural fluctuations in finger swelling caused by hydration and temperature.
The upgrade comes with a price hike. The entry-level silver and black models now start at $399, a $50 increase over the Gen 4’s base price. Premium finishes like Gold, Stealth, and the new Deep Rose—which leans more toward a copper hue than traditional rose gold—reach $499. This pricing puts Oura in a premium bracket, especially when coupled with the mandatory membership fee of $5.99 per month or $69.99 per year, a recurring cost that competitors like RingConn and Ultrahuman have sought to disrupt by offering subscription-free models.
Hardware Specification Comparison
| Feature | Oura Ring 4 | Oura Ring 5 |
|---|---|---|
| Width | 6.09 mm | 2.28 mm |
| Weight | 3.3g – 5.2g | 2.0g – 2.68g |
| Battery Life | 4-8 Days | 6-9 Days |
| Light Pathways | 18 | 12 |
| Base Price | $349 | $399 |
