Best Smart Rings Tested & Reviewed (2025)
By Simon Hill, Adrienne So | Published: 2025-11-04 13:30:00 | Source: WIRED
Other smart rings we’ve tested
We’ve tested many other entrants in this emerging category, some good, some bad, and some in between. Here’s the lowdown on some of your smart ring alternatives.
Photo: Simon Hill
Luna Ring 2.0 is $329: We had charging and connectivity issues with the first generation Luna Ring, but it looks like the Indian manufacturer has made significant improvements in version 2.0. My Luna Ring 2.0 comes with a fantastic wireless charging case (it’s $29 cheaper with the regular charging dock) that promises up to 30 days of power. The ring is supposed to last five days between charges, but I found four days to be more realistic. I don’t like the diagonal crease that marks the front of the ring, and it’s not as comfortable as the Oura. It houses all the usual sensors suspected of tracking (optical heart rate, blood oxygen, PPG, skin temperature). Data is split into Sleep, Wake-up and Activity tabs in the crowded app, with the obligatory AI option for tips and insights. There’s no subscription necessary, which is a big plus, and the data seemed reasonably accurate, but definitely on the generous side. Comparing a full day to the Aura, the Luna thought I got an extra hour of sleep, burned an extra 100 calories, and rated my preparedness at over 80 out of 100, while the Aura scored much lower and picked up on something stressing my body (I have a cold right now). If you want a free episode, I prefer the Ultrahuman episode above.
Photo: Adrian So
O-ring 2 is $349: This ring is beautiful, with rounded edges that make it look a little more jewelry-like than the Oura or Ultrahuman rings. I also love the enclosed charging case, which means you can bring it while traveling and recharge without a USB-C cable, and I also love that the Ring can power me through the day when I’m in my best productivity, workout, or caffeine zone. However, during my two-week testing period, I was experiencing constant server issues and data processing delays that made it difficult to double-check any of my health metrics for accuracy, such as heart rate, SpO2, or sleep data. It also makes it difficult to recommend this ring now. I’ll stick with it for now and see if this improves. —Adrian So
Movano Ivy ring, $269: When the Movano Evie Ring was first introduced, it was touted as the world’s first fitness tracker designed specifically for women. I was so excited! Recently updated to integrate with Apple Health (in the iOS version of the app), you can now see your cycle day on your home page, manually record your basal body temperature, and manually add workouts. However, these new features are largely incomplete compared to those offered by its competitors. Now that the Oura and Galaxy Ring can track your menstrual cycle with great accuracy, the time for this ring may be overdue. But it’s relatively affordable, there’s no subscription fee, and it has a blood oxygen sensor, so that’s kind of nice. —Adrian So
RingConn Gen 2 for $299: Despite the price increase compared to the first generation below, this smart ring is still relatively affordable and subscription-free. RingConn has retained the distinctive square design, but this second-generation ring brings significant improvements to sleep tracking (including sleep apnea detection), better battery life, and is a bit thinner and lighter. I found the basic sleep and health monitoring to be solid (sleep is more accurate than the first generation), but exercise tracking is still a major weakness. Although more exercise types are available, you have to turn on exercise tracking manually, and it struggles to be accurate at high heart rates.
RingConn Smart Ring, $139: Now at a deeply discounted price, the original Ringconn deserves attention. The slightly square design with beveled edges gives it a unique look, and the health and sleep tracking works well, lasting four or five days between charges. It also comes with a handy battery case (enough for several on-the-go charges). However, I had trouble syncing data, the app lacked proper exercise tracking, and the data was inaccurate at times, though the app is steadily improving with updates.
Amazfit Helio ring priced at $200: A provider of affordable fitness trackers like the Amazfit Active 2, I was expecting a competitive smart ring from Amazfit, but the Amazfit Helio has fallen out of shape badly. I love the subtly textured bronze color, but it’s the only color you get. Sizes are also limited to 8, 10, or 12 at the moment (sizes 7 through 13 will be coming). Although the Helio had similar capabilities to the smart rings mentioned above, it was sometimes hopelessly inaccurate, with its heart rate measurements being a far cry from other trackers. It lacks automatic workout tracking, averages three days of battery life for me, and the Helio is frequently disconnected from the cluttered and confusing Zepp app. You don’t do that needs subscription, but there’s Aura AI ($70 per year) for sleep insights and content or Fitness ($30 per year), which includes an AI coach. They are expensive and confusing. (Why have two separate subscriptions?) Helio works best with a smartwatch (I tried it with Amazfit Cheetah Pro), because it can integrate data, but as a standalone device, it is impossible to recommend it.
How do I choose the right smart ring size?
Some smart rings come in standard sizes, but there are variations, and half sizes are rare, so it’s worth taking the time to make sure you get the right ring size. Most manufacturers will send you a free size kit, allowing you to wear a fake ring for 24 hours. (You may have to buy the ring directly from the manufacturer to get this set for free.) You should definitely do this. Keep in mind that your fingers swell and shrink throughout the day. Your smart ring needs to be snug to enable the sensors to measure accurately, but you’ll have to remove it regularly to charge, so you don’t want it to be too tight.
What finger should I wear my smart ring on?
You can wear a smart ring on any finger, but most manufacturers recommend wearing these gadgets on your index finger, although the middle or ring finger can work too. All three of these fingers contain large blood vessels to monitor the pulse more accurately. What’s really important is that the ring fits tightly and securely around the base of your chosen finger, so if you have a large knuckle and a narrower finger base (more common with the middle or ring finger), this can be difficult. I recommend wearing it on the index finger of your less dominant hand because I found that wearing it on the right index finger, as a left-handed person, resulted in more damage to the ring and scratches on some of the things I touched.
What color or finish of the smart ring is best?
All of the smart rings we tested combine sturdy titanium with a sensor array inside, but the coatings and colors vary. If you are a ring lover, silver or gold will likely suit you better, as there is less risk of damage. Oura and Ultrahuman black rings have visible scratches and chips after a few months. Our Galaxy Ring test unit has been in testing for over a year, and the edges of the black titanium ring now look silvery.
Oura, Samsung, and Amazfit rings have little dimples to help you align the sensors. While I prefer the smooth finish of the Ultrahuman, I think the correct placement helps accuracy greatly.
How do I take care of my smart ring?
Most smart rings are durable, but if you want to avoid damage, you should remove the ring when working with tools, lifting weights, washing pots and pans, or even cleaning the sink. If your ring is likely to rub against a surface, remove it. I have found that wearing a ring on the index finger is more problematic than wearing a ring on the middle or ring finger. I scratched the Oura and Ultrahuman rings while gardening, moving boxes, and using dumbbells. Titanium is also strong enough to damage surfaces in your home. I ripped out the porcelain in my sink and marked the inside of the mug with an angular Ringconn. All of the smart rings we tested are waterproof, so you can swim or shower without taking them off.
How often do I need to charge my smart ring?
Photo: Simon Hill
Smart rings come with a charger and cable, but you’ll generally have to provide your own wall adapter. It takes an hour and a half to three hours to fully charge, but you should avoid letting the battery run out completely, otherwise you risk losing health data. We tested the smart rings above with all the bells and whistles turned on, so our battery life estimates are lower than the manufacturer’s claims.
What smart ring features should I look for?
Most smart rings will track your sleep, heart rate, and temperature. If you want to monitor your sleep and get health insights in an unobtrusive and convenient way, smart rings are perfect. Fitness tracking varies, with most smart rings providing a basic number of steps and movements, some offering manual exercise tracking, and others offering automatic exercise recognition. But you can expect more depth and accuracy from a traditional fitness tracker or smartwatch. Combining the smart ring with an Apple Watch or Fitbit provides a seamless experience, allowing you to take the watch off and let it charge overnight without gaps in tracking.
Smart rings or smart watches?
In the past few years, we’ve received many questions about why someone would get a smart ring instead of, or in addition to, a regular fitness tracker or smartwatch. Here are some reasons why you should consider it:
Better battery life. The smart ring is smaller and usually (if not always) has better battery life. It’s a useful addition to your collection if you hate missing a few hundred or a thousand steps while charging your smartwatch every day.
Sleep tracking. It’s no coincidence that our favorite sleep tracker is a small, unobtrusive ring. Maybe you’re tired of the bulky Apple Watch Ultra smacking you in the face every time you flip it over. (Or maybe you charge it instead!)
Course tracking. Many watches and fitness trackers now have a skin temperature sensor sensitive enough to detect if you’re sick or have been drinking alcohol. However, in Adrienne’s testing so far, only the Samsung Galaxy Ring and Oura have been accurate enough to track her menstrual cycle.
Finally, fashion. Watches are a statement and a status symbol; A smartwatch often doesn’t say anything about your preferences and choices besides “I don’t like to miss meetings.” Almost everyone we know who has bought a smart ring has done so because they have a Cartier Tank, Casio or Swatch watch that they don’t want to part with. If that’s you, good for you! And get a ring!
We’ve been wearing smart rings consistently for several years (sometimes two or three at a time), so we have a good knowledge of what makes a smart ring worth buying. Every smart ring we test has been worn for at least a month, usually longer, and we always compare its tracking data with our top pick (OURA) and with other smartwatches and fitness trackers (Apple Watch).
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