My fitbit has decided to start doing its own thing...yesterday lost all data after trying to find how I did at the gym so today I set it again but it still isn't playing.
Didn't take my mobile into the gym but did set it for steps outside the gym to compare.
Not happy that even though my fitbit was on in the gym it's only recorded part of the session and after wearing it all day too it hasn't counted my steps right but the mobile did. I estimate around 16300 ish steps including gym. With fitbit on.