Force Syncing is an action in the App to ensure the syncing process is up to date.
To force sync the app:
Go to the App home screen > Pull the Screen Down with your finger until you see the circling arrows (above the Forms and Jobs icons), change direction pointing to the top of the screen > Release your finger, the arrow will return to the top of the screen pointing down - this forces the sync. You will see the syncing bar triggering at the bottom of the page. Ensure that the bar moves all the way across the bottom of the device for the sync to be complete