does fitbit fitness tracker have the time
The Flex comes with a small dongle that plugs into your computer/laptop, automatically syncing data whenever the fitness tracker comes into range. The relatively low power consumption means the Fitbit Flex can last 4-5 days off a charge, after which youâll have to plug it into a computer for a juice-up.he Fitbit Flex doesnât. To get the most out of a Fitbit Flex, youâll need to hook it up to a phone with Bluetooth 4.0. The compatibility list of phones and tablets is pretty short, but includes favourites like the iPhone 4S, iPhone 5 and Samsung Galaxy S4.