iOS 7 came in like a wrecking ball, and while many users embraced the changes, others weren't so easily swayed.
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One of the biggest complaints was that the battery life seemed to be draining faster and faster. A reason for this is the "Parallax" feature. This is what makes your iPhone's background move when you move the phone, and turning it off may help you save a bit of battery life.
Here's how to do it:
Tap Settings
Choose "General"
In "Accessibility" Choose "Reduce Motion"