COROS Heart Rate Monitor, Auto-wear Detection

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.

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!

Can't say enough good things about this arm band HR monitor. I have a top of the line Polar H10 chest strap and there's no comparison. I'll NEVER go back to the chest strap!!! The chest strap isn't comfortable and always feels like it slips down. It also randomly loses connectivity. The Coros HR armband is so comfortable you forget you're wearing it. It's also (most importantly) VERY accurate and doesn't lose connection. Another very important thing to consider is the fact that the optical HR on all watches doesn't work that well, especially for women who aren't vascular. The optical on the watches seems to have a hard time picking up the pigment changes from the wrist. This arm band has completely solved that problem! Another thing that shouldn't be overlooked is the simplicity and battery life. Simple because all you have to do is keep it charged and put it on. It's all automatic. Turns on and off by itself. And one charge will last about 30 hours. There are now four people in our running group who own the Coros and everyone loves it. Coros, you knocked it out of the park with this armband technology and you deserve credit for that. Thank you and keep up the good work. P.S. - Although I own the Apex 2 and love it, the best bang for the buck at this time (01/30/24) would be to combine the Pace 3 with this armband HR monitor.

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 Coros heart rate monitor does not have all the bells and whistles of other units, but if you want to just track your heart rate, this is the one to get. No buttons, it turns on automatically when it comes into contact with your skin. There is a small led that turns green momentarily when it first contacts your skin. When you take it off, it turns off automatically. Easy peasy! It easily paired with my Garmin Edge Explore 2. Battery life is amazing!

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.

I bought this to replace a Polar Verity Sense arm HR band. I was replacing the bands on the Polar unit every couple of months, and each band is $25. When the unit started to give erratic readings, I decided to replace it with the Coros model. Coros bands are easier to take off and wash, and they only cost $15 to replace. The monitor is just as accurate as the Polar unit was when new. The battery lasts for a long time, and the auto-wear/on feature means I can't forget to turn it on or off. It's so comfortable, I forget I'm wearing it.

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.

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 2 Pas de VFC avec le Coros Plus agréable à porter au bras Nickel !!!

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

Muy buen medidor de frecuencia, siento más confianza que con el reloj. Le dura mucho la pila y es muy cómodo

Mi sono trovato molto bene con la fascia cardio della Coros. Nonostante io abbia un Garmin non ho riscontrato problemi nel suo utilizzo e si collega istantaneamente quando faccio partire la corsa. Il cinturino è comodissimo e non si sente minimamente quando corro ed è facilmente lavabile.