COOSPO Heart Rate Monitor Chest Strap H9Z, Bluetooth 5.0 ANT+ Heart Rate Monitor Chest Sensor with Rechargeable Battery, HRM Works with Strava/Wahoo Fitness/Polar Beat/Peloton/DDP Yoga App

I don't normally review purchases for no reason, but I've been very happy with this heart rate sensor. I'm not getting paid or compensated to write this, I'm just impressed with the product. I've been using coospo products on my bike for several years now, including speed/cadence sensors and regular coin battery-powered heart rate sensors. I was looking for a rechargeable unit so I could cut down on the number of coin batteries I go through, and so far this one fits the bill. It was easy to connect to my wahoo and to zwift, and so far it's performed very well. It's compatible with my older coospo hrm straps. I like the LED indicator on the front of the unit which indicates that it's sending a signal - it gives a little Iron Man vibe lol. I've only had to recharge it once so far in about 5-6 weeks of use (about 4-5 times a week for a couple of hours at a time), and it's a quick recharge time. Overall, very good value (especially compared to bigger name brand products), and very good quality so far.

I will be updating this unfinished review pretty soon, for better or for worse.In short: This HRM worked well and seemed accurate for four or five workouts, but then started glitching (see below). I tried [email protected] to ask for a possible fix, but clicking on the link didn't connect to anything. I then contacted Amazon who set me up for an exchange which didn't cost me anything for the new unit or for shipping the old one back (or for shipping the new one, but we have Prime). The new unit arrived yesterday (earlier than promised) and I charged it up completely. I used the Heartool app today and it worked well and seemed accurate. But that's how the first unit started also so I'll update this in a couple of weeks.First unit experience: When I bought this HRM, there were only three reviews on Amazon and all three received their product for free via Vine Voice. That's usually a big red flag for me, but CooSpo gets good reviews for their products in general and the reviews seemed well thought out and informative so I took a chance.After receiving it, I charged the unit up completely before using. I adjusted the strap to fit properly. I downloaded three apps to my android to see which one I liked best: Heartool (a COOSPO app?); Wahoo; Polar Beat. I alternated them each day to try them all out. Worked well and seemed accurate for 4 or 5 workouts, then started glitching: dropping the connection twice, showing a really high jump in heartrate once for about 30 seconds for no reason, and turning itself on when it shouldn't. I deleted the Wahoo and Polar Beat apps from my phone and even I trimmed some chest hair just in case; still glitched. Although I'm only using its most basic functions and only link it to my android, I liked it and would have given it five stars if it had continued to work well. With the first unit messing up and the support link not linking to support, I think the best they can hope for is a four-star review; we'll see.Me: early 60s; haven't exercised for over eight years; wanted HRM to make sure I got my heartrate high enough so I'm not wasting my time, but without, you know, dying; currently only doing step aerobics for 50 minutes to work off fat, but will branch out into other exercises later. Never used a HRM before. I exercise at home and traded convenience of wrist unit for increased accuracy of chest unit. BTW, as of this review, there are 15 written reviews and all 15 received free products. Think what you want about that.Edit 9/20/23. TL;DR on original review? Summary: Received item and it worked well for a few workouts, then started glitching. CooSpo support page didn't link to anything so I arranged exchange with Amazon. I submitted a tentative review on Amazon giving 2 stars and an explanation why; the next day, CooSpo emailed me to offer a refund for my purchase. I ignored their offer: I don't mind paying for a product that works, but a refund before the second item arrives feels like a bribe. New HRM arrived and it worked well for 12 workouts before it started glitching. I returned it to Amazon for a refund.

It works well. My first HRM was their forearm version - which worked well, but struggled when worn under layers during cold weather riding. I've experienced no such struggles with the H9z.6 months in, I'm convinced that this is the best value chest HRM on the market.I love the fact that it is rechargeable.This is my first chest strap HRM. I hated how it fit compared to my forearm one, but I eventually got used to it.

I purchased another brand that did work but had problems linking up to the apps I use. It didn't last 2 years before the plastic started breaking, eventually making it useless. I have the Coospo cadence and speed product for my MTB, so I figured I would try the heartrate monitor. It was smaller than the other brand and connected somewhat easy to the apps. So far, it has been way better. I do like the lights on the device that make it easier to know it's connected and working. the lights can be disabled if you choose, but I have found them useful. Good product so far!

Was great in the beginning, but now after slightly more than a year, it won’t even hold a charge

I have several HR monitor straps a MyZone, 2 Garmin Polar Bluetooth, 2 Polar H10's. They cast heart rates all over the place. A graph from all of them is a saw tooth image that can't be accurateThis monitor is accurate and solid. It tracks the pacing of my PM and I verifies it with a Datascope DCM-2 device. Plus it is rechargeable and has a battery life of 50 hours! I haven't figured out how to send the graph to other devices.

Se que hay gente que le da malas reseñas. Llevo varios meses usándolo y súper bueno. No se debe guardar conectado a la correa porque se descarga la batería ya que es muy sensible de los electrodos, incluso con solo tocarlo con los dedos se activa. La conexión ant no es la mas fuerte, pero no he tenido mayor problema

I bought this to replace a battery-powered Coospo that died due to internal corrosion, at first it was good, although it would not always connect to my iPhone, not the biggest issue, but for the price it was acceptable. For months it did what it was supposed to and would charge up, however, a week ago I went to charge it and nothing. So now it's dead and well past return, also notice that it is no longer available, so that is telling. Since I've gone through a few of these from this brand, time to pony up and get a better-known brand and hopefully avoid the dying issues from Coospo.