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What is the difference

What is the difference between the Bullzip PDF Printer and the bioPDF PDF Writer?

The short answer: Nothing!

The products are very similar in functionality. Only the branding is different. Bullzip is the community version that we offer free of charge for small installations whereas bioPDF is the commercial brand.

On the bioPDF website you can purchase licenses for the bioPDF product. This license also works with the Bullzip product. That means that if your Bullzip installation grows beyond the free limit and you need to purchase a license for your installation then you can use that license with the Bullzip product. In other words, you don't need to uninstall Bullzip and install bioPDF to use the license. You can use the printer of your choice.