Interesting app. What it does is take the PDF and create images of each page, then creates one long HTML page, where the images are added one after the other. I took a simple recipe in PDF format and converted it. It created 339 lines of code. The text in the images is not editable.
Of note is that the link above and in the MAS for support goes to a form requesting you fill in info about your support request. There doesn't seem to be any developer home page.
For three bux, it's cheap enough to buy and see if it works for you.