Killer fix for most issues: Close and Re-open the App

For iOS 7.0 or later:

  1. Double-press the Home button.
  2. Swipe up on the app



For iOS 6.1.4 or earlier:

  1. Return to the Home screen, and then click the Home button twice.
  2. Tap and hold on the app.
  3. When it starts to jiggle, tap the  to close it.
  4. Double-click the Home button and try opening the app again.

Note: If you are using an iPhone 3G or earlier, see this article for information on force quitting an app.


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