Yes, of course. You can free download all products and use their features for free. But flipbook created by this free plan will be branded with a watermark and you can only import 12 pages of your PDF file.
If you want to remove the FlipBuilder watermark from flipbooks and import more than 12 pages of your PDF file to the program, you need to purchase our product to get a license code. If you want to unlock more powerful features, you can go to our website: https://www.flipbuilder.com/purchase.html to purchase an edition that can meet your needs.