I select an app by touching its icon. How do I shut off an APP?

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Android Central Question

Some of my apps (whistle dog tracker, Firefox Android Beta) do not appear to have a way to close the app except by rebooting the phone using the power button. (phone is a Umidigi A3 Pro) What am I missing?


Q&A Team
Jul 7, 2013
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Android (and iOS really) isn't like Windows or macOS where you actually click something to close out an app when you're done using it. You tap the back button (on Android) until you get to the homescreen or tap the home button to go directly there, then the OS will manage the memory and kill active apps as needed in order to load more apps by your request.

Actively unloading apps from memory by the user can cause perceived performance issues, and also seem to cause worse battery performance because the device needs to load the app from the slower and more power-hungry storage.


Retired Moderator
Feb 12, 2012
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You normally use the back button to close an app. If you want to make sure, go to Recents (swipe up on the home button or use the Recents icon at the bottom, depending on how you set your phone up) and wipe that app away.

(It's still going to be in RAM - something has to be in every location in RAM - but that area of RAM is now marked as available, so anything can get loaded into it, and the app isn't using any power or resources by running - because it's not running.)

You can't just kill apps willy-nilly by going into RAM and "cleaning" them (the way some "cleaning" apps do), because some apps load other apps because they use a process in the other app, and there's no reason to have the same code in storage for every app. But killing an app with the back button, or swiping it away, won't cause that kind of problem. (If the app is marked "don't kill" [and that's up to the developer], nothing but a "cleaner" app will kill it. Even Android, when it needs more free RAM, won't.)

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