Fitbit device not syncing to the app.

[SDHinkle]

I can see on the Fitbit itself that it is recording steps. However they are not showing on the App. Each day it reflects something like 1,600 steps rather than the 20K or so showing on the Fitbit. I have tried resetting with the charger. I have an iPhone X and as far as I know I have downloaded all updates. This all was working fine for quite some time until a week or so ago. 

Moderator Edit: Clarified Subject.

[MarcoGFitbit]

Hello @SDHinkle thanks for joining the Fitbit Community, it's great to have you on board. 

I appreciate your participation in the Forums and for sharing your experience with us. I would also like to thank you for letting us know you've already tried to troubleshoot this situation. Tell me, which Fitbit device are you currently wearing? Have you restarted it already? If so, I would like to suggest you to try the following:

• The software on your mobile device is up to date. To check, tap Settings > General > Software Update.
• Make sure there are no other Bluetooth devices around as they might interfere with the syncing process
• Check that your Fitbit device's battery isn't critically low.

If your device still won't sync, try these steps:

1. Force quit the Fitbit app. 
2. Go to Settings > Bluetooth and turn Bluetooth off and back on.
3. Open the Fitbit app.
4. If your Fitbit device didn't sync, restart your phone.
5. Open the Fitbit app.
6. If your Fitbit device didn't sync, restart it one more time.
7. If your Fitbit device won't sync after the restart, log in to your Fitbit account on a different phone, tablet, or computer and try to sync.
8. If your Fitbit device still doesn’t sync, remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your mobile device and try to sync.

Thanks for your patience and understanding, give these steps a try and let us know the outcome.