After the latest update the polar flow app has stopped syncing the data from my M400 correctly. For example, when I sync my M400 to the app at the end of the day it will randomly say 9hr active when I only did a 40min workout. Also it will read 0% daily activity completed when on my M400 I had already reached and exceeded my 100% activity goal. It also only showed I did 2 steps when I had done 13401. BUT - the next day it will show that information on the wrong day ie. Part of Tuesdays diary is shown on Wednesdays diary. As well it does not show my tracked sleeping anymore when I wear the watch at night. PLEASE, PLEASE POLAR FIX THIS APP ! it used to work fine for my M400!