Ayman A R
That license will allow you to create EPUB files independent of our platform. So you can host if yourself anywhere, or open it using any ebook reader (which is EPUB3 compliant).
You can also create web and desktop apps that will run independently. This is independent of our cloud platform. To see the list of export formats that can be made in Kotobee Author, see this: kotobee.com/products/author/export
Our (paid) cloud platform basically will be useful for you if you want to add extra security and user access control to your ebook web apps, even if they’re hosted on your own server.