In 2025, the best smart rings last for roughly a week per charge. Want more battery life than that? The new Luna Ring 2 — announced at CES 2025 and one of my 7 favorite wearables at the show — promises four times the longevity, with up to 30 days of battery life. Of course, there's a catch.
The 30-day rating includes the use of the brand's forthcoming, pocket-sized charging case to top off the ring's power supply. Still, with health features and insights seemingly on par with Oura and Samsung, along with promising smart features, like a voice-activated AI assistant, the Luna Ring 2 is worthy of your attention.
Subscription-free and shipping in March, here's everything you need to know about the Luna Ring 2, including my first hands-on impressions.
Luna Ring 2: Price and availability
The Luna Ring 2 is manufactured by Noise, one of the largest makers of smart wearables in the world. Based in India, the brand has yet to make its debut in the U.S. or U.K. but that's about to change.
The Luna Ring 2 is available for preorder now — $50 holds your preorder and gets subtracted from the total cost once the ring ships. You order through Luna directly, with availability expected in March 2025. The starting price for the Luna Ring 2 will be around $300.
No word yet on whether the accessory charging case will be available as an add-on but I'm told by representatives from Noise that it likely won't set users back more than $50 and possibly much less.
Luna Ring 2: design
Like many of the top smart rings available, including the Oura Ring 4 and Samsung Galaxy Ring, the exterior of the new Luna Ring 2 is made from high-grade titanium — excuse me, "fighter jet-grade" titanium, as noted by Noise. I'm also told it should be a bit lighter than the current Oura Ring.
I tested the brand's sizing kit at the Noise booth at CES and within moments settled on a size 11 ring. Noise recommends that users wear the ring on their index finger, by the way.
The sizing kit is similar to what you get with Oura and Samsung but I've been assured that Noise has no intention to nickel-and-dime customers with an extra $10 fee for said kit. Once you make your purchase, the kit is mailed to you to try before confirming your final size choice. Then, your Luna Ring 2 is sent.
Of course, I prefer the digital sizing feature launching with the new Circular Ring 2, which I also demoed at CES.
At launch, The Luna Ring 2 will come in sizes six through 12. By comparison, Samsung, which just upped its Galaxy Ring size selection, has sizes five through 15 now available. Oura, meanwhile, offers the latest Oura Ring 4 in sizes four through 14.
Sensors cover half of the Luna Ring's interior, protruding out only slightly but not enough to cause any discomfort. The inside material appears to be some sort of high-grade plastic. A slight wave marking on the outside of the ring is the device's only real unique design element. It's presumably meant to face outward toward the world.
Speaking of aesthetics, the midnight black option has a mirrored metallic finish that appears to shift shades depending on the light, something I quite like. Other finishes include gold, rose gold, stainless steel and silver.
The ring feels well-made and quite comfortable on my finger. It also doesn't seem like it will scratch easily, though time will be the ultimate judge. Water resistance is 50 meters and a one-year hardware warranty is included with the purchase.
Luna Ring 2: features and battery life
On its own, the Luna Ring 2 is expected to get between five and six days per charge, a little less than Oura and Samsung. However, with the accessory case, Noise is claiming up to 30 days of usage or between five and six full recharges.
Samsung sells a similar case with the Galaxy Ring, but from our battery testing, it's good for only about two full recharges. Still, that extends the device's battery life to a maximum of 21 days per charge.
Wellness features are plentiful on the new smart ring with sleep, stress and women's health tracking, heart health monitoring, nutrition and exercise coaching, daily fitness and recovery insights and more. Noise notes that the device uses sensors made by Philips that promise 98.2% accuracy.
Another cool feature is the voice-activated AI assistant. I haven't tried it out yet, but some examples of questions it should be able to answer include "What should be average heart rate be during sleep?" and "Should I eat fruit for breakfast?"
Luna Ring 2: outlook
With no subscription cost and an app that works with both Apple and Android devices, the forthcoming Luna Ring 2 has an immediate advantage over each of its biggest competitors.
The level of holistic insights and AI-backed tools seem impressive and I'm looking forward to testing them out ASAP. Likewise, the voice-activated AI assistant dedicated to wellness info seems like a great feature, assuming that it truly provides valuable (and accurate) insights.
We're barely into 2025 and the best Oura Ring alternative competition is already heating up. Beyond Samsung, Noise will need to take on the new Circular Ring 2 and the recently launched RingConn Gen 2. Both of these devices cost about the same, play nicely across smartphone platforms and come without subscriptions.
More from Tom's Guide
