Scosche Rhythm R+2.0: Advanced Waterproof & Dustproof Heart Rate Monitor Armband with ANT+ & BLE Bluetooth Smart for Accurate Workout Tracking Compatible with Smartphones, Wahoo, Peloton, NordicTrack

This device is much more accurate than any other heart rate monitor on the market, to even include blood pressure cuffs and pulse ox monitors at the hospital.There are many other types of monitors, they typically take your pulse rate at your wrist or fingertips but this spot is nowhere as accurate as this device on your forearm. I don't know why or how, but it just is.Also, if you do not have a normal sinus rhythm then those other devices quicky become confused and give erroneous readings.I had to go to the cardiologist for a stress test with the O2 mask and 12 lead EKG. I asked the cardiologist and tech if I could wear this device and compare it to the pulse rate displayed by the ekg and other monitors. They were ok with it and very interested in how it would do.After 20 minutes it crushed this little test. It was spot on for my resting heart rate, max heart rate and only slightly lagged the EKG by a second or two.This is phenomenal and it is hard to relay how wonderful this is, as every other device I've used (to include fitbit and chest heart rate monitors) were unable to accurately measure my heartrate as it changed under different levels of cardiac stress. They did ok for my resting heart rate but could not give accurate and/or instantaneous readings of my actual heart rate while working out.The doctor was blown away, he stated that he had never seen a device on the market as accurate as the scosche, let alone a heart rate monitor that could accurately give instantaneous readings of people with arrhythmia's.I've been an athlete my entire life. I did crew and soccer in high school and college. I've done marathons, triathlons, 100 mile rides...etc. I've tried countless heartrate monitors, polar, suunto, Fitbit...etc and none could come close to me measuring my carotid pulse for 6 sec and multiplying by 10. (Or an entire minute)This device delivers, it's simple and accurate. It doesn't slide down like chest straps do when you do long runs, I don't have to apply any gel to leads. It just works and I know it's as accurate as a 12 lead EKG. It may not tell me that I have a t-wave abnormality or preventricular contraction but it continuously and accurately gives my pulse rate.The battery lasts about 5-7 one-hour workouts. After that, the pulse rate isn't as accurate. I know what a pulse rate of 140 feels like for me, so when my watch or phone displays a pulse rate of 90, I check my pulse and realize the device is not relaying correct data and I need to charge it. Once it's charged, it's good to go again.It syncs to most devices quickly as it uses standard ANT+ and Bluetooth.Bottom line-this works so well it surprised my cardiologist and I trust it with my life. I actually wouldn't workout without it anymore.

I've always hated chest strap HRMs, so I've been looking for something I can wear on my wrist or arm. I've been a Fitbit fan since its first days, so I thought I'd pick up a Charge HR in addition to the Charge I already wear daily. Unfortunately no matter how I adjusted it, I couldn't get a reliable HR signal. I'd bought the small (fits my wrist just fine), but doesn't have enough length for me to wear it much higher on my arm. I also discovered it doesn't work all that well with my Samsung Galaxy S5. So I returned the Charge HR, continued my research and happened upon the Scosche Rhythm Plus. This thing is fantastic! It works great with Sports Tracker Pro (my fitness app of choice) through Bluetooth. The app (and my phone) have Ant+ too, but I haven't been able to get the Scosche to keep a connection after I leave the settings page on the STP app. It's either user error or something with the app, I'm sure, so I'll figure it out eventually. In the meantime, it maintains a solid connection with Bluetooth and seems very accurate. I can still use my bluetooth headset as long as I connect it prior to launching STP and connecting the Rhythm Plus. I've been using it for good form fast walking but intend to use it while biking and working out on the Total Gym too. It's important for me to wear a HRM not only for motivation, but to keep me from overdoing and injuring myself, as I have lung disease. This is a GREAT, comfortable HR monitor!Update Nov. 8, 2015: A couple weeks ago I noticed a hairline crack on the sensor side of the Rhythm+. I'd never dropped the unit or otherwise abused it, so I assume it was a stress crack. I emailed Scosche support, and I got an almost immediate response with an RMA request form attached. I shipped my Rhythm+ the next day, and about a week later, the replacement was in my mailbox. The replacement's working great, and I'm hoping it lasts longer than the original.