I love my Scosche Rythm HRM. I had previously used a Polar Strap, which for the most part was accurate - would jump around if I was jumping around. I have not experienced this with my Rythm - I do not seem to lose contact with the armband. Armband is very comfortable and appears to be accurate when checked against the HR on the elliptical or treadmill. I'm never going back to the uncomfortable chest strap.

This device works great with an Iphone...only problem is I don't have an Iphone. I have a Samsung Charge. My girlfriend, who bought this for me, has an Iphone. It continually searches for my heart rate. Once it's able to connect, it's short lived. Any updates for the Android?

I was previously a user of a Polar FT7. The stap was becoming annoying and did not always work. My motivation for buying the RHYTHM was for the ease of use and the APP features. I like that is syncs with MYfitness Pal. As far a the other complaints about accuracy it does tend to bounce around a bit in terms of BPM, meaning it will register 150 but sunddenly drop to 70. However after some adjustment of the strap I find that it works best on your inner forearm, just above your aterial vien. To check the accuracy I used the eliptical machine's built in sensors in tandem. They matched almost perfectly. So far, I am impressed and will continue to use. I haven't used the map feature so I can't comment on that. I did read that others are registering higher than average running speeds. Some people are using the unit while driving in the car. That will create innacuracies. You can monitor your heartbeat but do not hit start on an activity until you are actually doing it.

I look forward to future app updates.

It's nice that it's a rechargeable device as well it's much more comfortable than a chest strap but a big downside is that it doesn't integrate with popular apps like endomondo, runkeeper etc.

Love this device, with one exception the forearm band does not last very long..... 6 weeks in and it is time for a new band already