This app allows me to transfer DRM free ePub books, converted to text files, to my Apple Watch - it is brilliant. You do however have to set up your iPhone correctly - create a dedicated folder in the Files app for your books - and you have to make sure the watch and the phone can connect when the apps are open - then it works. Just follow the instructions. It will not work very well on format or image heavy book files - but on novels it works fine. So I do not mark it one star because that cook book or picture book does not transfer. Navigation on the watch is by chapters and then left or right taps. It remembers your place. I do not use this as my default ebook reader but it is my standby reader. If you like reading this app is for you. It turns your watch into an “always with you book”.