App not working on iPhone

[SunsetRunner]

This morning I opened my app to sync. It showed a blank screen with the Fitbit logo at the top.  I checked periodically throughout the day with the same result. Finally deleted the app and downloaded again. Blank screen. No option to sign in or anything. 

[ManuFitbit · Accepted solution]

Welcome back to the community forums @SunsetRunner.

Thank you for sharing the inquiry regarding the Fitbit app. 

Sometimes it could be happened due to an upgraded process unfinished. Please, make sure that you are using the latest version of the Fitbit app. See: How do I use the Fitbit app?

[SunsetRunner]

Evidently that was the problem and it upgraded overnight.  Got up the next day and it opened with no problem.  Thank you for the help.