There are 3rd party apps that can do this for you, e.g. for $3 Sync Solver for fitbit:<p><a href="https:&#x2F;&#x2F;itunes.apple.com&#x2F;us&#x2F;app&#x2F;sync-solver-for-fitbit&#x2F;id935306292?mt=8" rel="nofollow">https:&#x2F;&#x2F;itunes.apple.com&#x2F;us&#x2F;app&#x2F;sync-solver-for-fitbit&#x2F;id935...</a>