Coros Heart Rate Monitor - 38 Hours Battery Life Bluetooth Connects up to 3 Devices

desertcart.com : COROS Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once (Gray, Large) : Sports & Outdoors Review: Works great with ZonePoints app - 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. Review: Comfortable/Accurate! No more chest straps for me EVER! - 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!