COLMI R06 vs R10 vs R12: Which Smart Ring Should You Buy?

If you've been browsing COLMI's smart ring range, the sheer choice can be a little overwhelming. The R06, R10 and R12 all track your heart rate, sleep and activity from your finger rather than your wrist, and at first glance the product photos make them look almost identical. But once you look past the marketing images and into the actual specifications each ring ships with, three quite different products emerge — aimed at three quite different budgets and use cases. In this guide we'll go feature by feature through the Colmi R06 Smart Ring, the Colmi R10 Smart Ring and the Colmi R12 Smart Ring, so you can work out exactly which one is worth your money, rather than just picking whichever one is cheapest or most expensive.

Quick Overview: Three Very Different Rings

It helps to think of these three rings as occupying three separate tiers of COLMI's ring lineup, rather than as minor variations on the same product. The R06 is the entry point: a simple, comfortable health tracker at a genuinely low price, built for someone who wants to try smart ring tracking without a big financial commitment. The R10 sits in the middle of the range, adding a proper charging case, a wider size range and an extra waterproof rating, for a fairly modest jump in price over the R06. The R12 is the flagship of the three by a clear margin — it's the only one with a genuine touchscreen and touchpad built into the ring itself, something neither of the other two offers at any price.

Understanding this tiering matters because it changes what question you should be asking. If you're comparing the R06 and R10, the question is really how much a charging case and a wider size range is worth to you. If you're comparing the R10 and R12, the question changes entirely to whether you actually want a screen on your ring, or you're happy checking an app instead. Keep that framing in mind as we go through the rest of this comparison.

Design & Build

All three rings use a stainless steel outer shell, which is standard across COLMI's ring line for durability and comfort against the skin, and all three are finished to a similar standard of polish. The R06 keeps things simple with a rounded stainless steel band available in Black or Gold, across sizes 8 to 12. It's a fairly classic, minimal ring shape that doesn't draw much attention to itself — which suits people who want their tracker to look like ordinary jewellery rather than a piece of tech.

The R10 refines this with a slightly more polished stainless steel casing, offered in Black, Gold and Silver, and a wider size range from 7 to 13, which makes it considerably easier to get an accurate fit if you're between sizes or have larger or smaller fingers than average. The extra colour option and size range don't change the core experience of wearing the ring, but they do make it a more practical purchase for a wider range of people, including buying it as a gift when you're not entirely sure of someone's exact ring size.

The R12 looks similar to the R10 at first glance from a distance, but it's the only one of the three with a small display and touchpad built into the band, so you can check the time, steps, heart rate and battery status without reaching for your phone. That extra hardware doesn't make it noticeably bulkier on the finger, which is impressive engineering given how much has been packed into a ring-sized footprint, but it is the main reason for the jump in price over the other two.

Sizing & Fit

Sizing is worth dwelling on separately, because it's one of the most common causes of returns with any smart ring, not just COLMI's. The R06 covers sizes 8 through 12, which comfortably fits most adult finger sizes but excludes people at the smaller end of the scale. The R10 and R12 both extend this range down to size 7 and up to size 13, giving noticeably more flexibility. If you know you tend to run small or large for rings, or if you're buying as a gift for someone whose size you're estimating, the R10 or R12's wider range reduces the risk of ordering the wrong size.

All three product pages include a printable ring size chart, and we'd strongly recommend measuring an existing ring you already own rather than guessing, since sizing conventions vary slightly between manufacturers and even between different rings from the same brand.

Battery Life & Charging

This is one of the biggest practical differences between the three rings, and it's worth understanding properly before you buy, because it affects how the ring fits into your daily routine. The R06 charges via a small magnetic charging cable and has no case — fine for topping up overnight on a bedside table, but less convenient if you're travelling light or often forget to plug things in.

The R10 comes with a proper charging case rated at 200mAh, good for roughly 13 additional charges, which COLMI states adds up to around 39 days of total use between trips to a plug socket. In practice, this means you can go away for a long weekend, or even a week or two, without needing to bring a charging cable at all — you simply top the ring up from the case, and top the case up from the mains whenever it's convenient.

The R12, by contrast, ditches the case altogether in favour of wireless charging: you simply set it on the included charging pad rather than plugging in a cable or slotting it into a case. This is arguably the most convenient charging method of the three day to day, though it does mean you lose the extra-charges-in-your-pocket benefit that the R10's case provides while travelling.

Battery capacity itself is similar across the range — roughly 15mAh for the smaller ring sizes and 18mAh for the larger ones on all three models — so the real-world difference in battery life mostly comes down to how the charging case or pad extends your time away from a wall socket, rather than any meaningful difference in the cell inside the ring itself.

Health Tracking Features

Heart rate monitoring, sleep tracking and activity or step tracking are standard across the R06, R10 and R12 — this is the core reason people buy a COLMI ring in the first place, and none of the three compromise on it. All three connect to COLMI's free QRing app, which turns the raw sensor data into daily, weekly and monthly summaries you can actually read and act on.

The R10 and R12 both add blood oxygen monitoring to the mix, giving you an extra data point alongside heart rate and sleep quality. The R06's product marketing also highlights blood oxygen readings as part of its feature set, alongside heart rate and sleep data, so in practice all three rings give you a broadly similar picture of your health day to day — the differences are more about presentation and convenience than raw sensor capability.

Where the R12 pulls meaningfully ahead is convenience: because it has an actual screen and touchpad, you can glance at your stats, control music playback on your phone, or even trigger your camera shutter with a simple gesture, all without opening the QRing app every time. If having quick, on-ring access to your data matters to you, it's the only ring of the three that offers it.

Connectivity & Waterproofing

The R06 and R10 both use Bluetooth 5.0 (BLE), while the R12 steps up slightly to Bluetooth 5.2. In practice, all three pair reliably with the free QRing app on Android and iOS, and the difference between Bluetooth versions is unlikely to be noticeable in day-to-day use — connection speed and range are both perfectly adequate for a device that stays within a few metres of your phone throughout the day.

All three rings carry an IP68 waterproof rating as a baseline, protecting against dust and accidental splashes or rain. The R10 and R12 go further with an additional 5ATM rating, meaning they can comfortably handle swimming and showering, not just incidental exposure to water. If you're a regular swimmer or simply don't want to think about taking your ring off before a shower, the R10 or R12's 5ATM rating gives noticeably more peace of mind than the R06's IP68-only rating.

Price & Value

Pricing is where the three rings separate most clearly, and it's worth laying the figures out plainly:

• COLMI R06 — from £35.06, the most affordable way into smart ring tracking, and a sensible choice if you're not yet sure a ring is the right format for you.
• COLMI R10 — from £43.10, a modest step up that buys you a charging case, more colours, more sizes and a better waterproof rating.
• COLMI R12 — from £62.12, nearly double the R06's price, but for a genuinely different product with an onboard display and touch controls.

Looked at this way, the jump from the R06 to the R10 buys you meaningful, everyday quality-of-life improvements for a relatively small amount of extra money. The jump from the R10 to the R12 is a bigger decision, because you're paying almost 50% more specifically for the addition of a screen — a feature you'll either find genuinely useful or entirely unnecessary, depending on how you like to interact with your health data.

Comparison Table

Feature	COLMI R06	COLMI R10	COLMI R12
Price (from)	£35.06	£43.10	£62.12
Colours	Black, Gold	Black, Gold, Silver	Black, Gold, Silver
Sizes	8–12	7–13	7–13
Connectivity	Bluetooth 5.0 BLE	Bluetooth 5.0 BLE	Bluetooth 5.2 BLE
Waterproofing	IP68	IP68 & 5ATM	IP68 & 5ATM
Charging	Magnetic cable	Charging case (200mAh)	Wireless charging pad
On-ring display	No	No	Yes, touchscreen + touchpad
Health tracking	Heart rate, sleep, activity	Heart rate, sleep, activity, SpO2	Heart rate, sleep, activity, SpO2
App	QRing	QRing	QRing

Pros & Cons

COLMI R06
Pros: lowest price of the three, comfortable everyday wear, covers the health tracking basics without any unnecessary extras.
Cons: smaller size range than the R10 and R12, no charging case, Bluetooth 5.0 only, IP68 rating only rather than the extra 5ATM swim rating.

COLMI R10
Pros: charging case for longer stretches away from a plug, wider size and colour range, 5ATM waterproof rating for swimming.
Cons: only a modest price increase over the R06, but still no on-ring display if that's something you want.

COLMI R12
Pros: only ring of the three with a built-in screen and touch controls, convenient wireless charging pad, gesture-based phone and camera control.
Cons: noticeably more expensive than the other two, and the display adds a feature some users may not actually need day to day.

Which Ring Suits Which Lifestyle

If you're completely new to smart rings and simply want to find out whether the format suits you, the R06 is the lowest-risk way to do that — you get the full core tracking experience without paying for features you might not end up using. If you already know you like the idea of a smart ring but want something a little more practical for everyday life — particularly if you swim, shower without taking jewellery off, or travel regularly — the R10's charging case and 5ATM rating make it the more comfortable long-term choice for very little extra outlay.

The R12 makes most sense for people who already dislike having to unlock their phone constantly throughout the day just to check a step count or heart rate reading. If that sounds like you, the ability to glance at your stats directly on your finger, control your phone's camera or music with a gesture, and charge wirelessly rather than fiddling with a cable, can genuinely justify the higher price.

FAQ

Which COLMI ring is best for beginners?
The R06 is the easiest and cheapest way to try out smart ring tracking without a big commitment, and it still covers heart rate, sleep and activity tracking properly.

Is the COLMI R12's screen worth the extra money?
If you like checking your stats without opening your phone, or want gesture-based control over your camera and music, yes. If you're happy relying on the QRing app on your phone, the R10 gives you nearly the same health tracking for considerably less money.

Can I swim with these rings?
The R10 and R12 are both rated to 5ATM, which is suitable for swimming and regular showering. The R06 is rated IP68, which is fine for rain, sweat and everyday splashes, but COLMI's own 5ATM rating on the other two rings gives more confidence for sustained water exposure.

How do I find my ring size?
Each product page includes a printable ring size chart — we'd recommend measuring an existing ring you own before ordering, since sizing can vary slightly between different rings and manufacturers.

Do all three rings use the same app?
Yes, the R06, R10 and R12 all pair with the free QRing app, available on both Android and iOS, so your data stays in one place even if you upgrade between models later.

Will the R12's screen drain the battery faster than the other two rings?
The R12 uses wireless charging rather than a case, and COLMI's stated battery capacities are broadly similar across all three rings, but bear in mind that actively using the screen and touch controls throughout the day will use more power than simply wearing the ring passively.

Can I upgrade from an R06 to an R10 or R12 later without losing my data?
Since all three rings use the same QRing app account, your historical health data stays associated with your account rather than the ring itself, so switching between models doesn't mean starting from scratch.

Verdict

For most people, the COLMI R10 is the pick of the range — the charging case, wider sizing and 5ATM waterproof rating make it noticeably more liveable than the R06 for only a small jump in price. If budget is the main concern and you simply want to try smart ring tracking, the COLMI R06 still covers the essentials well and won't leave you wanting for the core features. And if you want a smart ring that doubles as a tiny wearable screen with gesture controls, the COLMI R12 is the only one of the three that delivers that, at a price that reflects the extra hardware packed inside it.