It won't sync and I'm actually sick of it, it does this quite often. For the money I spend on fitbit watches this app and devices should properly work. I've had it Uninstaller and reinstall check wifi turn this off and turn it back on gee wiz. I'll NEVER BUY ANOTHER FITBIT PRODUCT. I'm switching to Galaxy or Apple. This is RIDICULOUS a d you'd think they'd fix it.