How can i close out background apps from running so it doesn't use up my data?

[AC Question]

How can I close out background apps from running so it doesn't use up my data? Need specific instruction please!

 

[belodion]

Use the Greenify app.

 

[NAKimble]

So, add another app to manage the apps...? I think I found a way to just stop the apps at the "Running" status. I'll try that and hope it works!