No. You can submit your work as epub, docx, and some more formats. You can then view how the converted version looks on various devices on the amazon website. I

No. You can submit your work as epub, docx, and some more formats. You can then view how the converted version looks on various devices on the amazon website. I used google docs for a short story and the docx version worked the best (epub from google docs had some weird spacing issues). The software helps as an alternative to having to submit it on amazon website during the various drafts.