Fitbit is updating two of its most popular fitness trackers. The new waterproof Flex 2 and heart rate-tracking Charge 2 are available now up for preorder and will officially go on sale in the coming ...

Wearable tech and fitness gadgets enjoyed a renaissance this year, and that trend is set to continue into 2015 as more affordable devices like the Fitbit Flex hit the ground running. The Flex is a ...

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