I have owned a Vivofit, and enjoyed syncing my performance data via the supplied ANT+ USB dongle with the 'Garmin Express' application.
I now own a Vivosmart and cannot sync my performance data to my NON Bluetooth 4.0 cell phone (like millions of people). I was a little shocked to discover the ONLY way to sync my performance data is via the supplied USB cable.
Please enable the 'Garmin Express' application to utilize Bluetooth 4.0 to sync performance data with the Vivosmart. It makes little sense that this obvious feature was missed by the product developers.
So simply put: A consumer buys a 5 dollar Bluetooth 4.0 USB dongle and can sync their performance data wirelessly with Garmin Express.
After all, it is the year 2014 and things like wireless are expected features of a $200 dollar product. Going backwards from the ANT+ enabled Vivofit to a physically cabled USB dongle on the Vivosmart is an oversight on someone's part.