Tapping Add causes the following to occur:
The application is added to the launcher.
If your administrator has enabled the system to work with mobile device management (MDM), the icon in the launcher is inactive until the installation process is complete.
The Add button is replaced by Open and Remove buttons.
The application appears with a green check mark in the gallery.
Native applications must also be installed on your device in addition to being added to the launcher. When you open an application that you have added from the gallery, but not yet installed on your device, the associated store, such as the SAP Store, opens to allow you to install the application.