“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 ...

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Fitbit Alta HR vs Flex 2 vs Charge 2: We compare the new Fitbit Alta HR, Fitbit’s first fitness tracker of 2017, with the Flex 2 wrist band and Charge 2 tracker. What’s the difference and which Fitbit ...