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Multitasking is a key advantage of smartphones in general and the iOS operating system in particular. However, users often forget to close apps after opening them, leading to increased battery consumption. Apple allows users to close multiple apps at once, which is very useful if you have too many apps open or want to close them quickly instead of one by one.
Step 1: From the Home screen of your iPhone or iPad, double-tap the Home button to activate multitasking spaces.
Step 2: To close a card, simply swipe it up with one finger. Instead of doing that, you can use two or three fingers to swipe up different cards simultaneously.
If you're trying to close all apps to save battery or ensure minimal battery drain when running in the background, this is a great trick to do so. Instead of manually accessing each individual app and closing it, you can now close them all in just a few seconds. This trick applies to iPhones, iPods, and iPads running on iOS 7. Earlier versions do not support this feature.
https://Mytour.vn/close-multiple-apps-at-once-on-ios-7-561n.aspx
This multitasking feature is exclusive to iOS 7, a very useful feature that shortens the time you want to close background apps on your device. Closing background-running apps also ensures reduced battery consumption and smoother device operation.
