• You can open the sluggish app or do it right from the Home screen.
  • Hold the Sleep/Wake button until the prompt “slide to power off” comes onto the screen.
  • Let go of the Sleep/Wake and hold down the Home button until the app is kicked off and you arrive back on the home screen
This will make iOS instantly free up RAM and improve performance. Please note that this method not only kills the app but it also seems to kill all apps and processes running in the background. So if you have music streaming in the background, then it will also kill the music app.
Please note that it is not advisable to purge RAM on iOS frequently as it does a pretty good job of memory management as it can have a detrimental impact on battery life. You should only use this method when you notice that an app or your device has become sluggish.

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