Luna Ring Gen 2 review: A stylish and subscription-free smart ring

Finest Costs At present: Luna Ring Gen 2

The Luna Ring Gen 2 is one other subscription-free sensible ring that desires to eat into the gross sales of the Oura Ring 4 and Samsung Galaxy Ring.

India-based Noise’s second-generation Luna turns to AI in an try to face out from the rising variety of related rings. It makes use of machine studying to supply recommendation on exercises and enable you to make higher diet selections.

Whereas the variety of sensible rings obtainable remains to be comparatively small, there are already some sturdy subscription-free choices on the market. Does the Luna Ring Gen 2 make a robust sufficient case to be one other one it is best to put in your finger?

Right here’s how issues performed out after I slipped on the Luna Ring Gen 2.

Design & Construct

• Accessible in 5 color finishes
• Comes with transportable charging case or a dock
• Waterproof as much as 50 metres

The Luna Ring Gen 2 has comparable design traits to many different sensible rings. It’s made primarily from titanium, with a non-allergenic moulding on the within the place you’ll discover the all-important sensor bump.

The sensor array, whereas not uncomfortable, did sit cosy on the underside of my finger.

Mike Sawh

There are 5 color choices to select from – Stardust Silver, Lunar Black, Sunlit Gold, Midnight Black and Rose Gold. The model I examined is the Daylight Gold mannequin, which has picked up just a few little scratches throughout testing. The ripple impact on the titanium helps to offer it a particular look to assist set it other than different sensible rings.

When you’re not sure of match, there’s a free sizing package obtainable. I’ve discovered sticking to the identical dimension as different sensible rings has obtained me match total.

Mike Sawh

The way you select to cost the Luna Ring will influence on how a lot you pay for the ring total. The pricier possibility is to seize it with the beautiful transportable charging case (pictured). You may as well go for the dock charger to avoid wasting cash (detailed pricing is under).

If you wish to take it for a swim, the 5ATM rated design means it will probably survive submerged in water as much as 50 metres depth. I’ve worn it within the bathe, within the pool and even in heavy downpours and the Luna has survived all of these situations.

Health & Monitoring 

• Tracks step, sleep, coronary heart fee and stress
• Free Luna app obtainable for iOS and Android
• LifeOS insights and steerage

There are some fairly commonplace sensible ring sensors in play right here that care for monitoring your information. That features repeatedly protecting tabs on coronary heart fee and day by day step counts.

A inexperienced optical sensor is current to cowl coronary heart fee monitoring, a pink one for blood oxygen monitoring and there’s additionally room for a pores and skin temperature sensor. Motion monitoring is roofed by a 3-axis accelerometer.

Mike Sawh

Knowledge is saved within the Luna app, which has a pleasant, stylised interface, breaking down day by day totals, sleep, readiness scores, exercise monitoring and the Luna AI options. 

For sleep, I’ve been sporting it alongside the Oura Ring 4 and information like sleep period and interval of sleep in addition to deep and REM sleep levels had been fairly comparable. Along with these core sleep stats, you can even see traits on hitting really useful sleep objectives, whether or not you’re hitting enough restorative sleep and these are all cleanly defined within the app.

Subsequent up is Readiness, which is a metric different rings have additionally adopted. This seems to be at metrics like coronary heart fee, respiratory fee and temperature. Once more, Readiness scores had been surprisingly much like these captured by an Oura Ring 4.

There are some properly offered summaries of that readiness information that will help you higher perceive what your scores are telling you. I’ll say, although, that coronary heart fee readings basically had been a bit on the beneficiant aspect. This isn’t probably the most correct sensible ring for monitoring coronary heart fee.

Mike Sawh

Subsequent up is exercise monitoring, the place you’ll be capable to see day by day step totals, distance lined, energy burned, together with displaying contributing components to your total exercise rating. The day by day step totals didn’t look wildly out from different health trackers.

If you wish to monitor a exercise, you are able to do that manually. Runners and eager walkers additionally profit from automated exercise recognition, which has labored fairly reliably in my testing.

Then there may be Luna AI, which you’ll be able to view as your hub to be taught extra in regards to the metrics this ring can monitor, in addition to establishing exercise and weight loss program plans. There’s additionally a day by day digest characteristic, which neatly outlines a few of your key information factors and what they’re telling you. Producing exercise and weight loss program plans could be very ChatGPT in strategy and proper now, it doesn’t really feel vastly personalised or compelling to make use of.

Battery Life & Charging

• As much as 5 days battery life 
• Charging case provides 30 days battery
• Absolutely fees in 120 minutes

I’ve managed to get roughly 5-6 days of battery life out of the Luna Ring on a single cost.

That’s what’s quoted by Noise, so it does at the very least meet these claims. That’s nonetheless wanting the battery life you’ll get from the Oura Ring 4, Samsung Galaxy Ring and RingConn Gen 2. You’ll see notifications from the app when it will get low to be sure you don’t get caught brief on battery.

Mike Sawh

The transportable ‘Surge Cost’ case has a large 500mAh capability battery. When full, it will provide you with sufficient battery to energy up for 30 days. When it does get low, I’ve discovered it takes roughly an hour to get from 0-100%, which is a charging fee largely consistent with the competitors.

Value & Availability

The Luna Ring Gen 2 launched in July 2025, priced from £269/$300. That makes it cheaper than the Oura Ring 4, the place pricing begins at £349/$349 and goes so much larger for sure fashions.

As talked about earlier, that beginning worth will simply get you the usual charging dock, or you may spend £299/$329 for the transportable charging case, which is a small worth to pay for the added comfort.

Although there are costs obtainable in {dollars}, the official retailer says the Luna Ring Gen 2 isn’t obtainable within the USA.

In contrast to Oura, there’s no further month-to-month or annual price to pay to make use of all the obtainable options. Meaning it joins the likes of the Samsung Galaxy Ring ($399.99), the Ultrahuman Ring Air ($349), Round Ring 2 (from $349) and the RingConn Gen 2 ($299) as rings the place you simply have to pay for the {hardware} alone.

Take a look at our record of one of the best sensible rings you should buy proper now.

Mike Sawh

Do you have to purchase the Luna Ring Gen 2?

I believe there’s a good quantity to love in regards to the Luna Ring Gen 2 and what it provides as a wise ring. The design is good, the app is fairly slick if a bit busy, and a lot of the monitoring is strong total.

I do assume it’s let down in a few key areas. Most notably with the center fee monitoring and a battery life that’s not fairly up there with the competitors. There’s a lot to work with right here and I do assume in the event you worth options like sleep monitoring and giving your information context, the Luna Ring Gen 2 does job of that.

It was a wise transfer to cost it under the competitors, although, because it doesn’t compete properly sufficient in all areas to beat one of the best within the class.

Specs

• As much as 5 days battery life
• Optionally available transportable charging case
• Works with Android and iOS
• Subscription-free
• Weighs 3-5g (relying on dimension)
• Waterproof as much as 50 metres 
• Optical coronary heart fee sensor
• Optical blood oxygen sensor 
• Pores and skin temperature sensor