Just tooling around, and I encountered a discussions about Clearview (Mac ebook reader), which then lead me to BookReader (ditto). Both are very old products, and the comparisons compared them to the older iBook reader. Has anyone here used these products, and how do they compare with the current Apple Books app (aside from reader the out-dated ebook formats). Moreover, why would anyone pay $9.99 for these over the free ones, especially when Calibre essentially offers much of the same thing? (i.e. should I continue looking into it, or just ignore them all?)