Verdict
The Circular Ring Slim is a smart ring that offer a lot of the monitoring smarts that Oura can , but does it from a conception which is n’t as attractive and also uses an app that just feel a piddling cluttered and in need of some finessing .
Pros
Cons
Key Features
Introduction
The Circular Smart Ring Slim emerges as another overbold ring that wants to show that there are other rings out outdoors of Oura that can now track your health , fitness and general eudaemonia from your finger .
It ’s a smart ring that claim to be the slim you could slip on and like the Circular Ring Pro , is loose from any extra subscription needed to get full entree to all of your metrics and penetration .
Those metrics and brainwave include tracking steps , sleep , sum pace , temperature and keep lozenge on your vigor levels , while Circular ’s Kira+ smart assistant will dish out advice base on your datum to encourage those better habit .
There ’s a lot to like about Circular ’s svelte smart ring on newspaper , so does it deliver where it matter or is this one to keep off from your digits ? Here are my thought .
Design and comfort
The Circular Smart Ring Slim arrogate to be the slimmest wise gang out there measuring in at 2.2 millimetre loggerheaded . TheOura Ring Gen 3 in comparison is 2.55 millimeter duncical while the RingConn saucy ring is 2.6 millimetre heavyset , so there ’s not a monolithic amount in it in terminus of that overall slenderness .
The Circular Ring is observably wider than other ring and , unlike others I ’ve essay , it is n’t made from titanium . rotary has opted alternatively on using a mix of aluminium and carbon fiber . That material alternative does make this ring light at just 2 thousand , but it also seems to guide to a lot more scratch appearing . I ’ve been test it for a calendar month and within a week of wearing it the edge of the ring were starting to show the silver culture lie underneath the matt bleak exterior . It did n’t look pretty .
The ring is n’t as refined as others I ’ve try out either . That ’s definitely not helped by the quite prominent white logotype on top of the hoop that at least helps to check that you ’ve got the ring on correctly . It comes in ring size from US 6 - 13 and offers a gratuitous sizing outfit to check that you get the right fit . I went with my usual smart ring size and it ’s been comfy to wear , though while it might be the slender doughnut , it has by all odds find like one I ’ve noticed more when it ’s on compared to other options .
The Interior Department of the doughnut is made from what Circular says is a medical - form , non - allergenic cloth . I ’ve not have any variety of vexation with the ring or had cause to take it off for any reason . You will have to take it off if you want to swim with it however . While Circular does n’t specify the waterproof rating , it does propose it ’s all right for wear in the exhibitor or when wash your hands .
Inside of that ring you ’ll discover an infrared , fleeceable LED and aerofoil temperature sensors and that infrared one does shine bright . There ’s also a 3 - axis of rotation accelerometer to go after motion to record daily step counts and enable sleep tracking . There ’s a vibration motor to start the build - in consternation and timekeeper lineament and a capacitive button that can be used to turn off that alarm lineament . If you ca n’t , for whatever reason , sync your information for that mean solar day , the Slim does have scope to store up to 20 day of data point , which is impressive to hear .
In the box you ’ll also get the battery charger , which is for certain tinier and more portable than other saucy gang chargers , make it easier to carry around and also easygoing to mislay too .
Fitness and health tracking
Like other smart closed chain , the Circular ’s focus is to monitor the type of things you ’d expect a wrist - worn health and physical fitness tracker to be able to . It will reckon your daily measure , monitor eternal sleep , heart rate , SpO2 layer , temperature and plenty more . There ’s a 14 - day standardization point , so you ’re really pay close attention to the data accuracy once you ’ve complete that calibration .
Those private metrics are display inside of the app alongside what Circular refers to as Circles . These are fundamentally ways it package up burden data and features that the orbitual offers . So there ’s a Circle for sleep psychoanalysis , stress spirit level , support guided ventilation exercises or taking a resilient measurement of metric like heart pace and SpO2 . There ’s also an Energy grievance Circle , which aspire to give you a mother wit of the level of vigour you have to take on your day . This is like to the readiness metric unit a sight of vigil and other rings adopt and is base on information capture during the mean solar day and nighttime .
Something the Circular ca n’t do is track exercise beyond how many footstep you take each daylight . It capture Cardio points based on heart pace and VO2 Max data , but you ’re not cause the ability to track specific exercises indoors or outdoors .
On that tracking front , I ’ve been using the Oura Ring Gen 3 and a Garmin watch alongside it and find day-after-day step totals were seldom tightlipped at all on most day . On some days there was a difference of less than 1000 pace , on other days the difference in aggregate was much greater . I ’ve never expected them to match , but I expected them to be at least in the same ballpark .
I kept the same gimmick on to compare sleep data where the Circular will track sleep microscope stage include REM , and also look at sleep mental disturbance , while tracking metrics like spunk pace variability , temperature and SpO2 point . It also simply score that log Z’s sentence as well . In terminal figure of sleep length , the data point was pretty similar across the devices .
Overall rest score seemed high on the Circular , suggesting better tone sleep in general . slumber stage seemed fine , though it definitely missed a few times when I know I ’d quite intelligibly woken during the night and was n’t register in the app . Other metrics like heart rate variability , breathing rate and sleep sum rate was a bit of a mix bag . eye charge per unit in particular felt a little high-pitched , though temperature variation information were like to Oura ’s temperature data .
The Energy analysis – which wait at data like steps , VO2 Max data , heart pace max and information like torso recovery , oxygen level and respiratory rate – offer similar metrics to my Garmin . However , after a day where I ’d slept badly after a late night and had to persist 14 miles I get a Energy Score of 95 while my Garmin had my readiness scotch at 30 , which feel more in line with how my legs were feel .
It does feel like some of the monitoring here is dependable . When I ’ve used the hot mensuration , real - time heart charge per unit has matched up with other devices , so there is some undecomposed data here . Meanwhile , my stress levels never seemed to change , which obviously is a good affair , but I ’d have expected to see a bit more of a wavering in that data on more jam-packed days .
The other bounteous element of Circular is the Kira+ supporter , which kicks into gear after that 14 - twenty-four hour period calibration period . Before Kira pop extend some perceptiveness into your datum , you ’ll be expect a bunch of different interrogation during that stop to help shape the variety of things this virtual assistant will serve up .
Kira+ offer day-by-day recommendations in the app in the form of a foresighted watercourse of textbook . That makes it a bit unwieldy to read through in one go and while there does n’t ever seem to be anything groundbreaking here , it will offer some useful prompt for beginners . For illustration , my body recovery account was scummy and suggested some Inner Light stretch or cardio work to improve things or tips to improve your sleep scores . It could all just be present in a much more drug user - friendly fashion than it is powerful now .
App
Unsurprisingly , with a deficiency of display bake into that tiny gang form factor you ’ll require to expend fourth dimension in the associate smartphone app to dig into your data and see those key insights .
The entire app is free to access and is available for both Android earpiece and iPhones . I ’ve been testing it with an iPhone and the experience on the whole has been fine . There are some bugs here and there , most notably a fall back notification secern me I could n’t rename the ring . It had a use of saying I was offline when take care through historical data . synchronize datum over from the band takes slightly longer than I ’d like .
It ’s not the prettiest of apps , but at least offer the pick between swooning and dark UI mode . I ’d say it ’s quite a busy app with your Circles ( different pockets of data tracked ) are situated at the top of the app with thingummy showing off steps , cardio points , sopor and other metric function below that . There ’s also preferences to change battery modes , adjust up a timer or contain your calendar of stats all on the same screen . There ’s just a little too much going on that main home screen .
The app does rent you sync datum with Apple Health and Google Fit , but that ’s where the third - political party support ends . So , unlike the Oura Ring , you ca n’t pull in data point from other apps to fill in some of the gaps of data that the Circular Ring is unable to supply . Namely exercise data .
There are a few non - tracking features to make this experience a bit more like your distinctive articulatio radiocarpea - ground fitness tracker . you may define timers that will send off a vibration to your finger’s breadth when that timer is up . There ’s also an alarum clock feature where you could tap on the logo on top of the anchor ring to end that alarm . While simple , these are decent way to show what else smart doughnut can be equal to of exterior of monitoring your steps or biometric data .
compare to other smart annulus companion apps , the Circular one feels like it needs some work , particularly on the UI front and arrange the data you ’re going to deal and take on board most at the heart of the app . right on now , it feel cluttered and necessitate a mo of love .
Battery life
The Circular Smart Ring Slim foretell up to 5 days in battery life , but that number does n’t represent what you experience in its most exact tracking mode . Circular use carrying into action and eco battery modes with the former giving you the most accurate data . The eco mode samples heart rate information at a less frequent charge per unit and disables access code to sleep stages information .
In that carrying out modal value , I typically beget two days of battery life , which is more or less shorter than what Oura delivers between burster . It ’s some agency short of the five days battery life I ’ve revel while testing the Ringconn fresh gang .
Charging it back up from 0 % take just under an 60 minutes and I have mixed feelings about the charging frame-up . It ’s the kind that you plug away directly into a spareUSB - Cport and is little enough to prune onto your key . The design , however , is n’t ideal for all charge up scenarios . For instance , plugging into a MacBook while working on a desk means the pack hits against the mesa surface ready it slightly uneasy to charge . orbitual does n’t include its extender transmission line , which it offers at an additional cost . It would have been nice to throw in for barren .
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Should you buy it?
Core data has broadly speaking been unspoiled enough to make the Circular Smart Ring Slim a utilitarian fitness tracker to fall apart daylight and night .
From the easy scratchable plan to software that feels a bit jarring , the Circular Smart Slim is n’t one of the best annulus in the business .
Final Thoughts
The Circular Ring Slim is a impudent ring that proves there are now more options outside of Oura and that you could supervise your wellness and fitness without pay extra for a subscription .
What it also prove is that you should n’t overlook the importance of the app you ’ll need to rely on to get the most of that ring , something that Circular and other alternatives still demand to do some oeuvre to refine and make it a more user - favorable position to be . I ’m not certain the design on the Slim is entirely up to scratch either and while cheaper than theOura Ring 3 , it does n’t match it for overall performance and usefulness .
Trusted Score
How we test
We soundly test every chic mob we review . We use industry standard examination to equate features properly and we use the sentry as our main gimmick over the review catamenia . We ’ll always tell you what we find and we never , ever , consent money to look back a Cartesian product .
FAQs
Slimmer design aside , the rings have the same feature with the Pro total in more color , offering farsighted assault and battery life and storehouse , and is made from stainless steel as controvert to the aluminium used on the Slim .
No , you do not have to ante up for a subscription to get at all of the features and brainwave available in the Circular companion smartphone app .
