Private App

Example case want to add Testing2 application.

To manage applications from Private App, you can go to Manager, then right click on the group to be managed then select Manage.
Select tab Application .
Click More app from Play Store at the bottom of the page.
Then the Google Playstore display modal will appear.
On the side bar of Google Playstore, click menu Private app.
Click the + button in the bottom corner.
Define app name, and upload .apk file of your private app.
Click create and wait about 10 minute until app can be selected and added to your application list.