Scosche Rhythm 24 Heart Rate Monitor Armband - Fitness Armband with Dual Band ANT+ & BLE Bluetooth - Waterproof & Dustproof Accurate Heart Rate Monitors with Built-in Memory for Storing Workout Data

Comfortable and very accurate. I checked heart rate on this device against pulse measured directly, and it was very accurate at all levels.

Very good HRM. 24 hour battery and 12 hour memory puts it leagues ahead of other similarly priced HRM, also reads HRV. The Scosche app is also very good. Much prefer it to my Polar OH1. The only downside is that it's a big chunky.

Purchased this device after a lot of research. It is the only arm band HR monitor that I could find that is bluetooth and ANT+ standard WITH onboard memory to record the workouts and not requiring a smartphone and/or a watch. - all this is a PLUS for its features.My main intent was to use this device during my swim sessions to monitor my heart rate.TWO NEGATIVES#1) The saved files time stamp are way off. For example, I swam at 6pm to 7pm. When I went to sync, the time stamp showed aS 12:30pm. This gets very confusing as earlier in the day, I did a different activity and recorded that too. I am unable to distinguish what HR is for what activity.#2) when HR is seen on apple health, I had 106 HR recording for a given minute. Seems this device is recording HR every 1/2 second. Wow, that's a LOT of data gathering. I certainly want to know what my heart rate is but not so excessive to a point I find my self scrolling endlessly, just to the what was my HR just 30 minutes ago. Imagine the number of entries to go through if I wanted to scroll back several hours.Spoke with customer service, they weren't aware of excessive HR entries being created but the incorrect time stamp issue is related to firmware. Hopefully, they will address the excessive HR entries, either through firmware and/or their app.Given this product is relatively new so I can expect some bugs but I am surprised they (R&D or QA dept) didn't see fix the incorrect time stamp when importing data. If I am not mistaken, another reviewer pointed out the incorrect time stamp issue as well.I liked so many things about this device, but for now, I will return this device. It is not quite ready for my needs. Perhaps, at some point down to road when all the kinks are worked out, I will consider purchasing it again. For now, I will go with a chest strap. Those are tried and true for delivering the data I am after.

Generally, I think this product owns the best hardware, comfortable, accurate, long battery life, extremely responsive that follows the chest band with only 1 to 2 seconds delay, very impressive. For the hardware itself, I can say it is a no-brainer chest band alternation for sports, training, and competition.Functional-wise, it is also perfect, can store the heart rate offline in the device itself, and the LED indicator to show your heart rate zone is a perfect function for the racers. You don't need to check your watch how many beats you stay right now, just check the LED color on this device, and that's it. Easy and convenient.For the build quality, it is just average. Feels very thin, not solid at all, and feels fragile in my mind.But, the software and the firmware destroyed this product. For me, the firmware already up to date, but I met the problem if I paired it with ANT+ devices such as Garmin Edge 1030 or FR935, then the heart rate signal will drop off for both ANT+ and BLE channels. I believe the device still captures the HR beats value, but will not transfer the value via the channels. I can guarantee I wear it perfectly. When the signal drops off, the LED indicator also is messed up. It just looks like the device itself stop responding for a while. This is extremely annoying.The software itself looks like created in 2000s, not good at all. Also, no version can be used for IPAD pro, even if you try to use the compatible mode like other apps did (such as Garmin Connect, on IPAD pro, it can only run under compatible mode). Interesting. It is just some minor changes with the software then it can support the IPADs, but no, we don't have the choice. Maybe this is not a big deal, since most of the time use the software only to setup the heart zone, the sport mode, etc. But you need to be aware that, this device does not support multiple BLE connections. So, if you use BLE to connect to the IPAD for ZWIFT, then you want to configure the sport mode for other intentions, you need to terminate the ZWIFT and then use the mobile phone to configure that. After that, if you want to back to ZWIFT, you need to turn off the mobile phone's Bluetooth to terminate the BLE connection permanently then you can connect to your PAD again.If this product can make the plastic shell thicker, feels more solid, resolve the firmware drop-off issue, and provide better mobile apps, I think this one will be the armband HR device leader for sure. But now, I would recommend the Polar one since that is more stable, never drop-off, and is reliable.