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.