How to determine which apps are posing the biggest problem to your phone's battery and if there's anything you can do?

Tap Large to make your apps a little larger and to remove app labels. Screenshot by Zach McAuliffe/CNET. 1. Long-press on your background to enter jiggle mode -- where your apps are all shaking.

Background App Refresh is a feature that allows apps to update their content even when they are ... although they may also reduce device performance and screen refresh rates. Selective App Management.

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Federighi also notes that closing background apps does nothing to improve your phone’s performance, for many of the same reasons it doesn’t affect your battery. iOS manages your iPhone’s RAM ...

Thankfully turning off Background app refresh is a very simple task that takes a matter of seconds. Plus, it's just as easy to reverse, so you can switch the setting on and off as required.