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Hello @nass, thanks for joining the Fitbit Community, it's great to have you on board! 
If your tracker is not syncing with the Fitbit app, I would like to suggest you to check @HelenaFitbit's excellent tips and recommendations that have been proven to be very helpful for many members of the Community.
In case the steps don't work for you, my best recommendation would be setting up your tracker as a new device to restart the connection between your phone and your Alta.
To set up your tracker as a new device:
- Go to the Bluetooth settings and check if your tracker is on the list of paired devices. If it is, tap on it and select Forget this Device.
- 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"
- Choose your tracker and follow the onscreen instructions to continue
- 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 keep me posted in case you need anything else. 
Best Answer
