CooSpoHW9 Heart Rate Monitor Armband,ANT+ and Dual Bluetooth5.0 HRM,Optical Heart Rate Monitor with HR Zone,IP67 Waterproof HR Sensor Compatible with Peloton Strava Zwift DDP Yoga

Update:After a few more runs, it’s not so great after all. On nearly every run, at about 1 mile, on nice flat paved surface, it shows a huge spike in HR, usually about 170, which lasts for a minute or two. Thereafter, it seems accurate. At my age (pensioner), a HR spiking 170 needs to be taken seriously but it turns out to be fiction, true HR is usually about 130-ish, as confirmed by recording concurrently on AW. Also confirmed by the fact that it happens before I’ve even hit the slightest gradient, and I feel no symptoms of exhaustion. I’ve experimented with upper arm, lower arm, facing out, facing in, adjusting tightness, makes no difference - I nearly always get that scary, but fictional, spike. I don’t think it’s cadence-lock, as shows HR climbing smoothly to 170, and dropping smoothly off again.I’m leaving my original favourable review below, and with five star rating as I do rather like it, it has some nice features, and the above glitch might not happen for everybody. And I’m keeping it too (not returning), for filing in my drawer of cute toys/gadgets. But for me, the search continues for a HR monitor that’s better than AW native.Original review:I’m an Apple Watch user, and a happy one. But a common fault is that Apple Watch sensor, like many wrist sensors, tends to be unreliable unless I wear it up near my elbow, which is uncomfortable and far from ideal. This device overcomes that problem perfectly, letting me wear the watch on my wrist. Took it on a 5 mile, 300ft run this morning, and all data proved realistic and credible. Far superior to a big brand chest-strap sensor that I tried.I really like the vibrating HR alert as I have a clinically diagnosed heart condition. I feel absolutely fine at high heart rates but, to keep my cardiologist happy, I try to keep an eye on it. I set the alert for 155 bpm and when it kicked in I simply relaxed my pace slightly, keeping an eye on the watch display, until HR subsided a bit. The Watch has its own HR alarms, but they are more subtle and easily missed.I also like that it has a physical on/off button. Much more reassuring than devices that claim to sense automatically. The charger is nice too, with a solid ‘click’ as the magnet attaches.Only thing I don’t like is I can’t get the watch to auto connect. It pairs automatically when switched on but I still need to go to watch settings to fully connect as a data source. I think that’s an Apple bug(/feature) though, and not Coospo’s fault.

The bluetooth connection is good. The armband is flexible and comfortable to wear on either the upper arm or forearm. The HR seems to be accurate

Love this item simple to use

The arm band is comfortable for long periods (forearm or bicep), haptic feedback from power button, very useful coloured indicators & great battery life. The Coospo app looks nice to use, connects easily, but this is where the good news ends. It seems to drop out (arm band still flashes away hapily) even with the phone close by. Using the phone for other things whilst connected (e.g. photo) is guaranteed to wipe any data you are collecting. <50% success rate capturing data even though each exercise starts to record well. The good news is that the 'Polar Beat' app connects seamlessly offers similar or better functionality. No problems yet. Great armband... maybe not the Coospo app.

I recently started to exercise, a rowing machine every other day. I now know why somedays I need 2 days off to rest when my heart rate spikes over 160 bpm for a long period of time. It teaches me how to keep myself at rhythm during workout, know my limits and track my numbers and calories burnt. It is also an incentive to keep going to the gym as you always have goals to achieve in the next day. I have been using the device for long enough now to say it works really nice without issues connecting to rowing machine and wahoo app at the same time

Worked great on my upper arm, used probably 20-25 tunes over the last 12 months, but has now stopped charging up and won't switch on. Would like to send back for replacement but can't seem to find details on Return now.

The HW9 was purchased in Oct 2023 to replace a chest strap monitor from the same company. Initially worked just fine and I was very pleased with it. However, after a month or so it became slightly difficult to charge and I would usually have to connect/disconnect the magnetic charger several times before it would start charging. This gradually got worse until now (early Jan 2024) where it now refuses to charge at all and is therefore useless. Maybe I was just unlucky, but I can only review with my experiences.

Cheaper and better than bigger brands in my experience after sending the Tickr back due to being faulty