A Custom App is any application that is not included in the Faronics Deploy library of 80+ applications.
Custom Applications that are not part of the default Deploy application library can be added to the Applications grid; once added, Deploy displays the version number of the application if installed on any computers. You can then install/uninstall/update the application from the grid.
Not all external applications are compatible out of the box; however, Faronics has Deployment Specialists to assist by writing a custom wrapper for the external application, which will enable it to work. See Request Assistance From a Deployment Specialist for further information.