10 Don’t Close All of Your Apps
So you have 50 apps on your phone and about 30 of them are open. Will this affect performance? Yes and no, but mostly no. iOS is designed to manage memory intelligently and Apple says it’s better to keep apps open as it can save battery and improve performance; however, some older devices do seem to struggle when too many apps are open.
In rare cases you may need to force close an app. On most iOS devices this is done by double tapping the home button—to enter the app switcher—and then by swiping up on apps you wish to close. With iPhone X there is no home button, instead you swipe up from the bottom and pause to enter the switcher, then press and hold an app until a little red circular icon—with a white minus sign—appears near the top corner of any open apps. Now you can tap this red icon or swipe up to close the app as before. Pro Tip: you can close multiple apps at once by swiping up on multiple apps simultaneously using two fingers.