The App list
is a list of all the installed apps on your phone. Tapping on a listed app will open it.
The App list is also the place where you can check the status of an app download or installation. If there's a problem with an app, you can usually tap Attention required
below the app name to get more information.
This tutorial will show you how to open the App list
to see a list of all the installed apps on your Windows Phone 8