[aiharkness]

Don't know (don't use it) but open it and then open the menu and look for close or exit.

Also, in most cases, holding down the back button while in an app will close the app, but not always. Test.

And also, if you hold down the menu button that will open the switch application ribbon. That will also show you what apps are running, but not always. Some apps that go to background when closed may not show.

But sounds like Google Maps may be the answer to your issue.