How do I exit PhotoSync (force the app to close)?
Follow these steps to force PhotoSync to close:
When PhotoSync is open, or it hangs or is crashed, click the home button to send it to the background.
From the Home screen, click the Home button twice.
PhotoSync should appear in the list of recently used apps. Tap on the screenshot of PhotoSync, hold your finger and swipe to the top of the screen.
Swipe as long as the screenshot vanishes from the screen to close the app.
Click the Home button and try opening the app again.