Noise Luna Ring (Gen 2) review: a subscription-free Oura rival thats solid
but not standout

Date:
Fri, 26 Dec 2025 12:30:00 +0000

Description:
An updated version of the Luna Ring with a slimmer design, better battery and useful tools but nothing game-changing in a crowded smart ring market.

FULL STORY ======================================================================Noise Luna Ring (Gen 2): One-minute review

The Noise Luna Ring 2 is the second generation of the Luna Ring . I reviewed the original in early 2025 and liked that it felt comfortable, offered solid insights, and was impressively accurate for sleep tracking from a first-gen product.

On paper, the Luna Ring 2 doesnt sound like a huge leap forward and,
visually, youd be forgiven for not immediately spotting whats changed. The design tweaks are subtle, and if you already own the first Luna Ring I dont think this is a must-have upgrade.

But taken on its own, this is a good smart ring. A few pain points have been ironed out. The ring is around 10% slimmer, theres a new charging case which looks great and stores multiple top-ups, battery performance has improved slightly and the app feels quicker to update. I also felt like sleep tracking was more precise this time round, which is probably due to the improved
sensor accuracy.

The main advantage here remains the same as last time round, theres no subscription here. That immediately makes it more appealing than the Oura
Ring 4 (the most popular smart ring) if youre not keen on adding another subscription to your life, especially if you consider that the Oura Ring 4 is more expensive to begin with.

Personally, the best new feature here is Lunas circadian alignment tools, presenting guidance about when to get sunlight, drink coffee and exercise throughout the day. It includes a caffeine window that tries to stop you sabotaging your sleep with badly timed coffee. These are genuinely useful, presented nicely and feel actionable and meaningful than an arbitrary score.

There are still some things I didnt like here. The app is pretty information dense and yet again the typography choices feel too small and fussy, which makes daily use less enjoyable than rivals. Theres an AI coach here, but it delivers generic chatbot advice rather than anything helpful. And while battery life here is good, it doesnt quite make it as long as some rivals.

But the biggest issue here is the market. When I first reviewed the Luna Ring Gen 1, I said one of the main problems wasnt the ring itself but the competition. Thats even more true now. The Oura Ring 4 still offers the most refined overall experience, the Samsung Galaxy Ring is great as long as youre not on iOS and the Ultrahuman Ring Air and RingConn 2 Air are strong subscription-free alternatives to both. More and more cheaper alternatives
are now entering the market too, like the Amazfit Helio Ring, which isnt as good but is cheaper.

If you want a capable, subscription-free smart ring with strong sleep
tracking and dont mind that it doesnt look quite as premium as the big names, the Luna Ring 2 is a good choice. Its just not the obvious pick and even though I like it Im not sure theres anything standout here to recommend it over the competition. Noise Luna Ring (Gen 2) review: Price and availability (Image credit: Future) Price is around $329/299/AU$510 No subscription fee Several color options at the same price

The Luna Ring 2 is available for around $329/299/AU$510. I say around as pricing seems to vary across regions and Im writing this during sale season when prices are fluctuating.

It comes in a range of finishes, including Sunlit Gold, Stardust Silver, Rose Gold, Midnight Black and Lunar Black that last one is a matte shade. All of these finishes are the same price, which is good as some rivals charge more for specific colors or materials. Then again, that could explain why the Luna Ring 2 has a less premium look and feel than rivals, but Ill get to that later.

That puts it below the Oura Ring 4, which typically retails for $349/349 at full price, though more premium materials and colors can push that up to $499/499. Whats more, youll need an ongoing membership to unlock full insights, which is a further $5.99/5.99. The Samsung Galaxy Ring was also
more expensive at launch at $399/399/around AU$750, though its hard to
compare given its not for iOS users.

Meanwhile, subscription-free rivals include the Ultrahuman Ring Air at 329
(it isnt available in the US at the time of writing) and RingConn Gen 2 Air
at $299/280/AU$570 (approx). You can also find the Amazfit Helio Ring for 119.90 as a budget option.

All of this means the Luna Ring 2 is more affordable than the Oura Ring 4 but not a budget pick. The lack of subscription does help it seem better value, but its not so cheap that its a no-brainer over the rest. Value score: 3.5 /
5 Noise Luna Ring (Gen 2) review: Specifications

Colors

Silver, Black, Matte Black, Rose Gold, Gold

Weight

3-5g (depending on size)

Material

Titanium

Battery life

Up to 7 days

Connectivity

Bluetooth

Waterproofing

Up to 50m/164 ft (Image credit: Future) Noise Luna Ring (Gen 2) review:
Design Light and comfortable Slightly slimmer than first Luna Ring Can look cheaper than rivals, especially in gold

The Luna Ring (Gen 2) is a light and compact ring, weighing between 3g and 5g depending on the size you need. On paper, thats a small shift from the Gen 1 ring, and Luna says its Gen 2 ring is 10% slimmer and lighter overall. In reality, the difference is subtle. But the Gen 2 is genuinely very
comfortable to wear 24/7.

Sizing runs from 6 to 14 and you get a sizing kit in advance, which works the same way as most smart ring brands. Its based on standard ring sizes, but I still find that different brands fit slightly differently, so the kit is
worth using.

The ring itself is made from titanium with a PVD coating and theres a non-allergenic and seamless inner surface that sits against your skin. Its rated 5ATM, which means you dont need to take it off for showers, swimming or getting caught in the rain. Ideal if youre trying to build a habit of wearing it constantly. (Image credit: Future)

As for colors, theres a nice choice here. Stardust Silver, Rose Gold, Sunlit Gold, Midnight Black and Lunar Black, a matte shade. The marketing images
make most of them look shiny, and in real life the Sunlit Gold I tested is particularly shiny. Other brands have glossy finishes too, but here it tips over into looking a bit more like a plastic gold ring rather than blending in to look like jewellery, at least to my eye.

The real star of the design in this newer version isnt the ring itself, but the new charging case that comes with it. Instead of the little charging plinth that came with the Gen 1 version, you now get a compact case that
looks more like the cases you get with earbuds, or the Samsung Galaxy Ring. Not only does it pack in lots of extra charges, its one of the nicest smart ring charging solutions Ive used so far. Design score: 4 / 5 Noise Luna Ring (Gen 2) review: Features (Image credit: Future) Strong core health and sleep data Circadian alignment tools genuinely helpful AI integration feels
gimmicky

The Luna Ring (Gen 2) follows the familiar smart ring formula, lots of
sensors in a tiny band. You get green and red LEDs for heart rate, blood oxygen and skin temperature tracking, photodiodes and a 3-axis accelerometer for movement.

From those, Luna tracks your sleep time, sleep stages and sleep score,
resting heart rate and heart rate variability (HRV), respiratory rate and SpO2, temperature fluctuations, stress, activity and menstrual and ovulation tracking, based on temperature and HRV.

Theres automatic detection for walking and running, plus basic workout
logging for other exercises. Though, as with most smart rings right now, this isnt designed to replace a full-on running or fitness watch, but it works
well for general movement.

Its worth noting theres no VO2 max estimate here, which youll find on some rival rings and many of the best smartwatches . If you like that training metric, you might miss it here.

The more interesting additions on the software side are Lunas Life OS platform, which has been updated in this version. It brings new tools like
the aforementioned circadian alignment guide and a caffeine window. These suggest the best times to get sunlight, eat, exercise and drink coffee based on your patterns, with the aim of nudging you into a more consistent rhythm and protecting sleep.

I found those features genuinely useful and really nicely presented. Even if they dont transform your sleep overnight, they did gently encourage me to think about my day in a way thats more aligned with my sleep and rhythms.

Theres also an AI coach here, but I found it quite gimmicky (like most AI integrations these days). Its essentially a chatbot bolted onto your health data. Now, some people might enjoy asking it questions, but in my testing the nutrition and lifestyle advice felt generic. Responses could be slow and if you already know the basics of health and fitness you might find it a little condescending.

On the integration front, the Luna Ring currently works with Apple Health and Google Fit, which at least lets you pull workouts from other platforms. But there are no deeper third-party integrations yet, so you cant plug it
directly into more specialized training apps or health dashboards, for example. Features score: 3.5 / 5 Noise Luna Ring (Gen 2) review: Performance (Image credit: Future) Sleep tracking feels upgraded Battery life is good,
not class-leading Good app but a bit cramped

Lets start with the battery, as thats been updated over the previous version. Noise says youll get between 4 to 7 days, which is quite a broad amount of time. During my testing I consistently got just under 6 days out of it, which I think is good. Its an improvement over the first ring, which only ever reached 4 days.

The charging case can store around 30 days of power before you need to plug
it in, which was really handy. Especially considering the charging case is light, small and looks nice.

For content, the Oura Ring 4 and Ultrahuman Ring Air can deliver six to eight days, while the RingConn Gen 2 Air can stretch to 10 to 12 days. So Luna sits in the good but not outstanding bracket where battery is concerned. Good
thing its got the charging case this time around, which helps did I mention
I love the charging case?

The Luna Ring (Gen 2) will automatically detect walking and running and in my experience it did this reliably. Youre prompted to confirm detected sessions, which is handy.

For other exercise types, youll need to log activities manually and there are lots to choose from, including yoga, treadmill, cycling, bouldering, pilates, even surfing. As with most smart rings, its not a hardcore training tool, theres no GPS or dedicated workout models. Think of it more as an everyday health tracker that handles simple workouts reasonably well rather than something youd use for serious training.

I have mixed feelings about the Luna app. On the plus side, its packed with information and you can dig deeper into information about sleep, readiness, activity, temperature and more. In some places, scores are accompanied by short explanations, which I always appreciate more than a bare number. (Image credit: Future)

However, the presentation of the data still doesnt quite land for me. Fonts are tiny and a lot of elements are tightly packed together. Its a subjective complaint, sure, but one that does impact on my day to day enjoyment of using it.

Some of the language and flagging around health data also feels more alarming than it needs to be. For example, waking up to a red exclamation mark on my SpO2 with a blunt Pay Attention message isnt in line with how I think wearables should be talking to us about health. The same goes for some of the coaching prompts, theyre technically accurate, but not particularly warm or human.

Sleep tracking is where the Gen 2 shines, it does a great job at picking up
on sleep and wake times, even on nights when my sleep was broken. I often
wake up around 3am, read for a few hours, then go back to sleep. The Luna
Ring 2 picked up this pattern consistently, where in the past other wearables have not detected the break or not detected me falling back to sleep again.
It also detected short naps accurately.

You get a full breakdown of your sleep stages, a nightly sleep score and insights into whats pushing that score up or down. Over time, trends are
handy to see. (Image credit: Future)

As for whether those circadian tools I mentioned earlier improve my sleep, thats hard to say definitively, but having prompts about when to get outside, drink coffee or exercise did make me more intentional about my routine.

Finally, theres the AI coach. I know other reviewers enjoy this kind of feature, but here it still feels like a very basic chatbot sat on top of your data rather than anything geared to personalized guidance. Generic nutrition tips, slow responses and a lack of nuance mean its not something I enjoyed using.

Though I will say one of the suggested prompts was Which health metric needs my attention today? which does highlight anything noticeable without digging around. Without that Id say it was a bit useless. Performance: 4 / 5 (Image credit: Future) Scorecard

Attributes

Notes

Rating

Design

Light, comfortable and slightly slimmer than Gen 1. The gold color looks less premium than rivals. But the charging case is excellent.

4 / 5

Features

Strong core health and sleep tracking with useful circadian alignment
feature. The AI coach and lack of VO2 max are my only bugbears.

3.5 / 5

Performance

Accurate sleep tracking, decent activity detection and good but not class-leading battery. App is overall great but needs a design refresh in my opinion.

4 / 5

Value

Cheaper than some rivals and subscription-free but not cheap enough or polished enough to be a really obvious choice over rivals.

3.5 / 5 Should I buy the Noise Luna Ring (Gen 2)? Buy it if

You want a smart ring without an added subscription
Oura is still the most popular choice, but its monthly membership and initial price make it an expensive choice. The Luna Ring 2 is one of several capable subscription-free alternatives.

You want accurate tracking and plenty of data
Ive focused a lot on rivals in this review, but taken by itself this is a
good device with accurate sleep and recovery tracking, and a generous amount of data and trends to explore.

You want strong sleep tracking without bulk
If you mainly care about sleep and general recovery, smart rings are hugely appealing because you can ditch the bulk of a smartwatch at night. Dont buy
it if

You want the absolute best tracking and polish
I was impressed by the Luna Ring 2 overall but the Oura Ring 4 will still deliver the most polished experience in terms of design, app refinement and depth of insights.

You care a lot about premium materials and finishes
If you want your smart ring to double as jewellery, Ouras rings do look and feel more high-end.

You already own the first Luna Ring
This is a nice step up with a better charging experience and extra features. But if youre happy with the Gen 1 and not itching for a new ring, there isnt
a killer upgrade here. Noise Luna Ring (Gen 1): Also consider

Oura Ring 4
Still the best all-rounder for design, app experience and depth of data
across iOS and Android. More expensive than the Luna Ring 2 and does require
a subscription to unlock its full potential. But for some the extra polish
and insights will be worth it.
Read our full Oura Ring 4 review

Ultrahuman Ring Air
A strong subscription-free alternative. With a slick design, polished app and good sleep and recovery tracking. Its widely considered the second best
option after Oura.
Ultrahuman Ring Air review How I tested the Noise Luna Ring (Gen 2) (Image credit: Future) Paired with an iPhone 16 Pro Wore the ring 24/7 Ive been testing wearables for 12+ years

I tested the Noise Luna Ring 2 for several weeks, paired with an iPhone 16 Pro. I wore it all day and night, including running outdoors, to gym
sessions, during long workdays in coffee shops, evenings at home and, of course, while sleeping. I only took it off to charge it or when showering yes, its waterproof but I never like to risk soap or shampoo messing it up.

Over the past 12 years Ive reviewed dozens of wearables, including smart watches, fitness trackers and smart rings from Oura, Ultrahuman, RingConn, Motiv, and more. Having got hands-on with so many, Ive got a strong sense now of what makes a smart ring comfortable, truly useful from design and comfort to performance, app quality, and long-term wearability and standout in a
busy and competitive space. First reviewed in November 2025 Read TechRadar's reviews guarantee



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