I dont know what to think of this great app: the fact that it now opens epub books makes it even better with the day. The developer seems to be committed to taking user input and keeping regular updates so for that reason, anyone looking for a great app that does effective file management on iPhone or iPad, must look no further. The answer lies here: do all your file management tasks in this app and opens any type of document in use today. The fact that it op[ens chm files makes it the only app that is usable as a portable ebook reader. No longer need to be worried about books from Windows PC or from Mac not being compatible with your iOS device. Keep this up, I wish there was a 10 star -- I would have gladly endorsed it with all my heart. I Expect to see even Mobi files in future versions, I now just download my Gutenberg books straight on my iPad without hustles. Or even consider adding a built-in browser for navigating to some web pages. Otherwise , excellent, excellent, excellent!