How to manage Challenges in Fitbit for Windows 10 | Windows Central
How to use challenges in Fitbit for Android | Android Central
How to use challenges in Fitbit for Android | Android Central
louisgray.com: Fitbit Launches Challenges to Push You and Friends to Go Further
Fitbit Support a Twitter: "@heri @heri Hi. Sorry for the inconvenience. To better understand, mind to tell us more about the issue you're having with your Fitbit device? To further check on
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