“What is the difference between the Fex Wireless Activity and Sleep Tracker and the Flex Wireless actvity tracker???? I see there is a Flex wireless activity tracker and Flex wireless activity AND SLEEP TRACKER. When I read about both of them they say the same thing??? Can both of them be linked to any mobile phone? Please tell me the diffrence.. Thank you”

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• they are the same thing as i believe all of the fitbits have sleep tracking capabilities except for maybe the cheapest one which is a step counter only. for linking to any mobile phone they have a list on the fitbit website as to which phones they trackers can sync up too. all of the fitbits come with a usb sync device you can plug into your computer so you can sync it.

  Answered by nottoshabby 9 years ago

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• There is only one Flex model.

  Answered by CommunityAnswer 10 years ago

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