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Oura Ring 4 vs. Oura Ring 3 – my favorite smart ring just got these big upgrades

The Oura Ring Gen 3 has officially been replaced by the Oura Ring 4. So, whether you stumble upon an Oura Ring Gen 3 as stores clear stock, or want to know if you should upgrade to the Oura Ring 4, you’ve come to the right place.
I used the Oura Ring 3 for many years since it was released back in 2021. But the newer Oura Ring 4, featuring an all-titanium redesign and longer battery life, is here as of October 15 starting at $349. Going forward, those interested in buying one of the best smart rings from Oura will exclusively shop the Oura Ring 4 — only third-party retailers will have the Oura Ring 3 while their inventory lasts.
That said, there are some upgrades worth noting when it comes to the Oura Ring 4 vs. Oura Ring 3. The biggest changes materialize with the actual ring design and sensor accuracy. But when it comes to the companion Oura app and types of fitness tracker metrics the smart rings supply, the two have more in common than you might expect.
Below you’ll find everything you need to know about the Oura Ring 4 vs. Oura Ring 3.
Oura Ring 4 vs. Oura Ring 3: Specs compared
Swipe to scroll horizontally Header Cell – Column 0 Oura Ring 4 Oura Ring 3 Starting price $349 $299 Sizes 4-15 6-13 Colors Gold, Rose Gold, Silver, Brushed Titanium, Black, Stealth Gold, Rose Gold, Silver, Brushed Titanium, Black, Stealth Sensors PPG (heart rate + SpO2), skin temperature, accelerometer PPG (heart rate + SpO2), skin temperature, accelerometer Weight 3.3-5.2 grams 4-6 grams Thickness ~ 2.88mm ~ 2.7-2.9mm Battery life Up to 8 days Up to 7 days Subscription $5.99/month $5.99/month
Oura Ring 4 vs. Oura Ring 3: Price and availability
The Oura Ring 4 replaced the Oura Ring 3 as of October 3, 2024, with customers no longer being able to purchase an Oura Ring 3 directly from Oura.com; however, October 15 is the official Oura Ring 4 release date.
As for pricing, the Oura Ring 4 starts at $349, which is $50 more than the Oura Ring 3’s starting price for the original Heritage style that had a ridged exterior; however, the fully round Oura Ring Gen 3 Horizon style started at $349.
Oura Ring 4: from $349 @ Oura
The new Oura Ring 4 starts at $349 and is available in six different metal finishes: Rose Gold, Gold, Silver, Brushed Titanium, Black, and Stealth. It features a smooth interior and up to 8 days of battery life.
Oura Ring 4 vs. Oura Ring 3: Design
The Oura Ring 4 might look just like the Oura Ring 3 at a glance, but take a closer look inside, and you’ll see there’s been some pretty significant changes made to the newer version’s design.
Where the Oura Ring Gen 3 had three protruding ridges inside that housed the fitness-tracking sensors, the Oura Ring 4’s sensors are almost entirely recessed. There are now two ever-so-slightly raised bumps — I think most people won’t even notice them.
The Oura Ring 4 is also now made entirely of titanium, whereas the Oura Ring 3 had a titanium exterior and epoxy layer on the interior. This makes the ring marginally more lightweight, but apparently helps in terms of accuracy, too.
Another significant change to design is the Oura Ring 4 comes in sizes 4 through 15, providing 4 more size options than Oura Ring 3. While you’ll still need to confirm your best fit with a sizing kit, the added sizes now give the Oura Ring an edge over the Samsung Galaxy Ring in this regard. Samsung’s smart ring comes in sizes 5 through 13.
Oura Ring 4 vs. Oura Ring 3: Fitness-tracking features
The Oura Ring 4 introduces a new system called

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