Accurate step count?
I can't recall whether it was the Flex or charge that I'd heard gives a false reading on steps taken just from arm movements?? Trying to decide which to invest in and want sleep details to be accurate.
Typically, it is the arm movements, but if you think about it, most of the time you are walking anyways. Now you could flap your arms, but that would defeat the purpose. This has really helped me be more aware of my physical activity. It has stayed pretty accurate. One day I was tired and spent the day on the couch and it definitely reflected it at the end of the day. On days I know I am more active, it reflects that too. The sleep has been pretty accurate too. Hope that helps!