Ever since Apple introduced the new multitasking feature for its iOS devices, there was a shortage of app killer apps for iOS devices. Over time when more and more of the apps gets opened in the background of your iPhone or iPad, your device feels sluggish and you find it difficult to manage all the apps at once. At those times, you need an application to kill all the open applications at once.
Unlike Android, there are no applications available in the App Store that can kill all the open applications at once. So you need to look for Cydia tweaks.
Here’s one of the Cydia tweaks that can kill all apps at once for iOS9. It is Slide2Kill 9.
For installing this application, you need to open your Cydia application. There search for Slide2Kill 9. There are other tweaks like Slide2Kill 7 for iOS 7 devices, you need to ignore those if you are running on iOS 9.
After installing this tweak, you need to restart your springboard. Once your device loads again, just open some apps.
Now, go to multitasking, and slide down any app. You now notice that all the open apps will be killed on one single swipe down while multitasking.
This feature alone saves you a lot of time, especially if you are an avid multitasker having lots of apps open at the same time.