Apps use two kinds of memory: Storage memory and RAM. Apps use storage memory for themselves and any files, settings, and other data they use. They also use RAM when they are running.
Go to
Settings
.
Touch
Apps
All apps
.
Touch
Show system
to include system processes in the list.
Touch an app, process, or service in the list to open a screen with details about it and, depending on the item, to change its settings, permissions, notifications and to force stop or uninstall it.
