Fitbit tracker not syncing correctly with iOS 11

[GoalieMom1]

Ever since iOS 11 updated, Fit Bit won’t syncs unless I turn off phone restart and the turn off Bluetooth every single time. Not convenient.☹️ 

Moderator Edit: Clarified Subject.

[MarcoGFitbit]

Hello @GoalieMom1, have a warm welcome to the Fitbit Community, it's great to have you on board. 

Which tracker are you currently using? Have you tried to restart it as well? If so, I would like to suggest you to enable All-Day Sync in the Fitbit app to improve the connection between your tracker and your phone. To enable All-Day Sync in the app tap on Account > your tracker > All-Day Sync. 

If this doesn't seem to solve the issue, my best recommendation would be setting up your tracker as a new device to reset the connection between your devices. Don't worry, none of the information already stored in your account will be deleted. 

To set up your tracker as a new device:

1. Go to the Bluetooth settings on your phone and check if your tracker is on the list of paired devices. If it is, tap on it and select Forget this Device. 
2. Restart your phone once again. 
3. Open the Fitbit app and tap on the Account symbol at the top right corner of the screen, then tap on "Set up a New Device"
4. Choose your tracker and follow the onscreen instructions to continue
5. When the app asks you to replace your current tracker, please replace it and continue with the process.

I hope this can be helpful, give it a try and let me know the outcome! 

[GoalieMom1]

I reset the Fitbit, turned off phone, checked Bluetooth settings, and now my phone in Bluetooth setting does not locate the Charge 2 at all.