Hi @Luvsmurph and welcome to the forums! The first thing to do is to check to make sure your Fitbit app and phone OS have both been updated to the latest versions. If it still won’t sync, try restarting it three times. You can find other troubleshooting tips here.
Best AnswerIt is helpful to include the device the app is on, when asking about the app.
Logging out/in on android often helps. Clearing the apps cache is also good.
Best Answer