STEPS
TOOLS
Goto Settings
Choose iTunes & AppStore
Scroll down: Toggle off the 'Updates' to disable automatic updating.  Toggle of 'Use Cellular data' if you don't want any of the automatic updates to use your cellular data.
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How to disable automatic app update in ios7

If you don't want your iPhone to automatically update the apps in the background, which is a new feature in iOS7, you can follow these steps to disable it.