“Fitbit Flex 2: The waterproof tracker is smaller, lighter, and better looking than the old Flex but it’s still got a few issues.” Swimming and automatic activity tracking requires extra steps to ...

The good: Comfortable, Sleek design, Long battery life, Automatically tracks exercise, Swim-proof The bad: Lack of a screen limits its usefulness Who should buy: Swimmers; Those looking for an ...

Fitbit upgraded its basic Flex band with water resistance for swim-tracking, but its step counts require manual tweaking to achieve accurate automatic exercise-tracking. The Flex 2’s headlining ...

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