COROS Heart Rate Monitor, Auto-wear Detection | Comfort,Easy to wear, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once

I was a part of a voluntary COROS HRM device testing program for two months ahead of the public release for this device, and was so impressed with the metrics it provided that I felt it valuable enough to buy as a gift for a fellow athlete. This quick review reflects my experience with the device during testing (and afterwards), and is not sponsored by COROS.About me: I’ve been an avid runner since 2012, trending towards longer endurance-based events. I’ve run a number of ultramarathons and a handful of 100 mile races. I also do a bit of road and indoor (stationary trainer) cycling as cross-training.Things I like: This HRM appeals to me because of its simplicity and versatility. I like that there are no buttons (it senses when it is being worn), and I like the fact that once you set the sizing, it stays put and is easy to slip on before an activity. For sizing: I’m 5’-9”, 160-ish, and I still have plenty of slack in the strap…but I don’t do a lot of lifting. It is SO much simpler and WAY less noticeable than a chest strap. I also love the magnetic charger–even though it is relatively short (and proprietary). Charging is quick, and the battery life is ample, so it won’t be charging for very long anyhow.Data accuracy: During testing I compared this new HRM to my Wahoo TICKR HRM, as well as data from wrist-based optical HR sensors (COROS Pace 3 and Apex 2 Pro watches). The short summary is that the most consistent data came from this COROS armband. The KICKR chest strap–while plenty accurate–was slower getting an initial reading before beginning an activity, and had some data drop-outs during the activity as well. Chest straps occasionally require adjusting during activities as they loosen and slip. Wrist-based HRM sensors work fairly well, but are somewhat activity dependent. Cycling (especially if venturing off-road) can jostle these sensors from wrist contact and can result in some inconsistent data too. The armband stays securely in place, and is so comfortable and light I often don't notice I'm wearing it. During testing there were data anomalies from all devices, but the armband HRM produced FAR FEWER than any of the others.Material thoughts: The armband material has held up well so far, but DOES tend to get stinky and discolored with wear. I’ve had mine since early July, and wash it with soap and water occasionally when I can’t stand the funk, and it cleans up nicely (see photos). Replacement armbands are also available, though I can't see needing one for a good while.Something I wrote to the product testing group during evaluation: “The more I run with both an arm and chest strap the more I LOVE the arm band. I’ve now got a rash from the chest strap and it drops signal more than any of the three HR options. I’ll admit that I’m a sucker for simplicity, so would normally just use readout from the watch (decent)…but if I need an accurate and responsive HR readout, I’m picking the HR31.”Summary: This armband doesn’t miss a beat (ha!) and makes a lot of sense for an athlete interested in reliable HRM data across multiple sports. I initially wasn’t too keen on adding another device to my quiver, but this HRM earned its place, and would be a worthy asset to those who value consistent accurate data across disciplines.

OMG. I didn't even know I needed this until I was told about it and tried it out! While I've used chest straps for years, I have put up with the chafing, itchiness, and general uncomfortableness of them (multiple brands). NO MORE! After using the Coros HR Monitor Arm Strap I will NEVER go back to chest straps again! When worn on the bicep it is hardly noticeable. Barely even know its there when worn! It linked up fast and easily to my Coros watch! Discovered I can even link it to my Strava account thru phone's bluetooth for heart rate monitoring! I use Android, but it paired to my daughter's iphone also when she asked to use it!Linked up to my bluetooth exercise bike at the gym too! When used for my runs and gym, the readings adjust instantaneously to my heart rate changes with no delay and more importantly accurately! This will be a game changer come this winter since the monitor will be closer to my heart and respond more quickly in the cold temps! Stated battery life is 38 hours, so perfect for thos LONG ultras! Gonna wear for my 50k in three weeks! One of the best things is it turns on and off automatically when worn or not, no more power buttons YAY! The strap is easily removed to wash and the unit itself is waterproof, so no issues with rain! As it is brand new item, there haven't been many updates yet, but Coros always improves and updates as needed from my experience. This has been probably the best $79 I've spent during my running years. Gonna suggest to all my friends to get one!

I bought this to replace a Polar H10 chest strap that was starting to fail after a few years.I use it for cycling and have only used it twice so far but it has been flawless with no spikes or dropouts. It seems accurate and agrees with my Apple Watch which I know agrees with my chest strap. It is more comfortable to wear than the chest strap and also don’t have to keep replacing the CR2032 batteries. I was a little skeptical because I had a few arm bands in the past that were terrible but this one is solid. I bought this instead of the polar Verity because it was less expensive and I did not need all the bells and whistles. It works perfectly with my Garmin Edge cycling computer.

A few years ago I decided to start exercising and eating right. I'm 69 years old and decided I didn't want to spend my senior years using a walker. I joined a gym and started a weight lifting program to improve my sore back and arthritic joints. I bought a smart watch to monitor my heart rate between sets. Most of them were wildly inaccurate. After some research I decided to purchase the COROS Heart Rate Monitor. My needs were simple. Provide a readout during workouts, maybe a simple chart to measure the peaks and valleys, a kind of EKG chart. After a couple of weeks attempting to pair the device with my phone and watch I discovered that while my phone easily paired with the device the accompanying software app did not. It was then explained to me that the COROS app does not pair with the monitor and is only used to update the firmware. It was recommended that I use a third party app most of which require monthly or annual fees. After investigating a few of them, I realized that the services provided far exceeded my intended use. I decided to apply for a refund. I can't tell you how disappointed I am.

This is a nice heart rate monitor. I use it while riding a stationary bike. It is simple to use, comfortable, accurate, and reliable. The tricky part was finding a decent app to interface with it. The COROS app isn't all that useful during workouts. It will show your current heart rate and that's about it. In my opinion, the popular exercise apps like Strava and others ask for too much personal information upfront and are cluttered with too many functions that I don't need. Plus they tend to prod the user to sign up for a monthly subscription to "unlock premium features."The best app I've found is ZonePoints (Android). It works well with this COROS HRM and it shows a real-time graph of heart rate, color-coded for 5 different zones. It also saves each workout to history and stats for comparison.

Bottom line up front: buy this heart rate monitor, you won't regret it.I've spent the last few months putting this COROS armband through its paces. As a triathlete with a CrossFit problem, here's what keeps me coming back:1. Accuracy. First and foremost, it consistently delivers results on par with my Polar H10 (which now sits in a drawer as a result) and, in some cases, was more accurate (especially activities that sometimes involve weird chest movements or jumping, like in CrossFit). It showcases an absolutely snappy response to abrupt changes in HR during interval training. And, because it's an optical HRM, zero issues with tracking correctly from the moment you hit start, no matter the environmental conditions (unlike the age-old problem with humidity on chest sensors).2. Comfort. It's so light you completely forget it's there! Importantly, it never rubs, chafes, or creates discomfort. On the upper bicep, it's never in the way, no matter the activity. The band itself easily adjusts to any arm and it can slide right off the sensor to throw in the washing machine and clean (when was the last time you washed your chest sensor??).3. Ease of use. Frankly, it just works. If you own a COROS watch, this will sync right up. Though, while it works seamlessly with the COROS ecosystem, it will work with any Bluetooth-connected device (I have paired it with indoor rowers, other exercise machines, and non-COROS watches without problem). Lastly, this thing has a long battery life and is rechargeable, so you never have to worry about not having a spare battery on hand (the app or watch will even tell you how much battery is left).Zero regrets on this purchase. I strongly recommend the COROS armband to anyone who asks.

This is an excellent piece of wearable fitness tech that delivers on comfort and accuracy, but it’s not without a couple of hiccups. I’ve tested it extensively across multiple workouts using both a Coros Pace Pro and a Garmin Fenix 7X—two reputable GPS watches with reliable HR integration. During two runs and two cycling sessions on each device, the arm band performed very well in general. The only two issues I experienced were: (1) one 35-second dropout during a 2-hour Coros cycling workout, and (2) a Garmin run where the band didn’t begin recording until half a mile in, despite appearing connected.Those were the only problems across all sessions, and while they’re not ideal, they were rare. In comparison, I’ve worn the Garmin chest strap for over 100 hours with zero dropouts. That said, the chest strap is much less comfortable than this armband. The comfort level here is unmatched—you almost forget it's on, and the strap never binds or cuts in like chest monitors can, especially during long runs. The build quality feels excellent, the band fits securely and adjusts easily, and the USB-C charging is a very welcome upgrade over more dated charging setups.The accuracy is excellent under normal conditions and stacks up very well against more expensive solutions, even outperforming wrist-based HR readings. One possible reason for the rare signal dropout could be my heavy tattoos, which occasionally interfere with some optical HR sensors—though it's worth noting that the Garmin chest strap does not suffer the same issue.In terms of quality, fit, and comfort, this is a standout product. It’s also an exceptional value for the money, especially when compared to more premium-priced competitors. Functionality is generally solid with the rare exception of brief signal loss. Durability seems promising, and I expect it to last under normal training conditions.Overall, while I’m docking one star for occasional signal drops, this remains my preferred heart rate monitor due to its superior comfort and ease of use. I’ll be using it exclusively from now on.

My biggest complaint about my Coros Apex 46mm is the accuracy of the heartrate sensor. Once the temperature drops below maybe 70 degrees, it is all over the place - one minute it thinks my 42 year old heart is pumping over 200 beats per minute (which would probably kill me), and the next time I look it will be at 72 while I am sucking air crushing a steep climb on my gravel bike. In other words, it sucks.I thought about upgrading to the new Apex model because I love the convenience of being able to log a workout at any time without extra equipment, but the fact is that, while my current watch is the worst monitor I have owned, none of the wrist-based heartrate sensors can match the accuracy of an external sensor. I ordered this instead, and immediately put it on and went for a jog in sub-freezing temperatures - the type of thing that would normally make me cringe when I looked at the heartrate graph in Strava. There wasn't a single dropout, nor a single unexpected spike. All of the data looked exactly as I expected it to. I've spent enough time looking at my heart rate at different exertion levels, and I can usually guess my heart rate within 5bpm. I saw zero surprises, so if it isn't perfect, it is definitely close enough to track your effort and calorie burn during workouts.Pairing was easy with my Coros watch/app. I simply added it through the app and my watch was able to connect to it. Actually, it was so easy that I was looking for some way to validate that I was using the right sensor.My only complaint is that the band is just a bit small... I would prefer to wear this on my bicep, and even if I adjust it as large as it will go, it borders on uncomfortably tight.

Fungerar väldigt bra och syncar lätt med Garmins cykeldatorer.Pulsmonitoreringen har failat/låst sig en gång...startade om min Edge 850 och det bara fungerade. Jag gissar att det lilla problemet kan sägas bero på Garmin.

Le brassard polar peut être utilisé en natation et sans connexion mais il faut à chaque fois l’allumer et l’éteindre. Le Coros s’allume et s’éteint automatiquement.Les mesures sont semblables entre les 2Pas de VFC avec le CorosPlus agréable à porter au brasNickel !!!

Bought in Jan, broke in Jun. No idea why. Cant find reasonable customer support

I am using it with my coros watch and it's perfect match

Excellent armband heart rate monitor. It connects flawlessly to my Peloton equipment with zero setup hassle. It’s comfortable to wear, and once you’re used to having an armband HRM, you barely notice it’s there. Heart rate tracking is very accurate—especially the rise and fall during workouts—noticeably better than what I get from watches, which is exactly why I purchased it. I don’t own any other COROS products, so this has been a standalone purchase for me, and it’s performed perfectly.