No matter how efficient your iPhone is, it doesn't hurt to close active apps from time to time to free up memory and minimize background processes. Force closing is also a great way to resolve bug issues and can often resolve minor issues without having to restart your device.
Doing this on older iPhones has been the same since iOS 7: double-click the Home button and swipe the problem app to kill it completely. This method does not apply to the iPhone 11, 11 Pro, and 11 Pro Max, since they do not have a Home button, so you will have to get used to new gestures involved with force-shutdown apps.
If you come from an iPhone X or X S the process of force-closing apps is the same. But if you are new to the world of "notched" iPhones, this is how it works.
Close apps close
Before you can forcefully close an app, you must first go to the app switch. So swipe up from the bottom of the screen, stop when your finger reaches the center, and pause until the app cards appear. This pause is vital – by quickly pulling your fingers up without stopping, you will return to the home screen.
Once you are in the app switcher, swipe aside until you find the target app and swipe up on the app card to close forcefully. Repeat for any other app that you want to close, and then swipe up from the bottom to return to the home screen.
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