Turn Background App Refresh On / Off - Apple® iPhone® 4s

When Background App Refresh is turned on, apps that take advantage of this feature can refresh themselves in the background. For additonal info, refer to iOS: Multitasking and background-app refresh.

1. From the Home screen, navigate: Settings > General.
2. Tap Background App Refresh.
3. Tap the Background App Refresh switch to turn on or off .