The Fitbit Community is a gathering place for real people who wish to exchange ideas, solutions, tips, techniques, and insight about the Fitbit products and services they love. By joining our Community, you agree to uphold these guidelines, so please take a moment to look them over.
@racheljb - you may need to Logout of the Fitbit App and swipe off the active window and in Android clear the storage cache and force stop it and then restart the phone.
This is in case there is an issue in the app Heart Rate tile.