When unlicensed a watermark will be added to all PDFs created with it. This is done under royalty free licensing (you only pay for the OEM license).
Since no integration is required your application can be written in any programming language and you will still be able to use novaPDF OEM. You don't have to integrate anything into your application.It also comes with documentation detailing its installation, integration and distribution, as well as a code sample. It can be rebranded for an additional fee.
The novaPDF OEM printer has to be distributed and comes with royalty free licensing. NovaPDF OEM Developer includes a Customization tool that lets you configure the novaPDF OEM printer distribution.