The iPhone's multitasking feature makes it possible to quickly switch between running apps without ever fully closing an app. The primary benefit of this feature is that you won't have to wait for the ...
If an app is acting up, here's how to force-quit it iPhone X and newer: Swipe up halfway and pause to reveal the App Switcher view. Then, swipe up on the app to close. iPhone SE, 8, and earlier: ...