7 Close *Some* Apps
You may know that closing out all of your apps in the multitasking pane makes your battery life worse contrary to popular belief. But, confusingly, exiting out of non-essential apps may speed up your iPhone. That’s because open apps still take up memory.
But since this will generally have a negative impact on your battery life, you’ll want to opt for a balanced approach. Close out of non-essential apps you don’t use regularly, but keep apps that you come back to on a daily basis open.