# Custom App

## What is a Custom App, and When Would I Need to Install One?

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. 

{% hint style="warning" %}
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](/faronicsdeploy/application-management/install-uninstall-and-update-apps/install-application-s/install-external-application-s-custom-app/request-assistance-from-a-deployment-specialist.md) for further information.  
{% endhint %}

To create a Custom App and install for the first time see [Create a Custom App](/faronicsdeploy/application-management/install-uninstall-and-update-apps/install-application-s/install-external-application-s-custom-app/create-and-install-a-custom-app.md).


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