Problems from the start.
Device - iPhone 12. Importing from Google drive. I have to go back to the files and double and triple check whether all the files are downloaded. And then tap "All" button over and over again. Why your app can't just download all the files in the folder? It skips files, or just doesn't go to the end of the list. Also, for some reason it mixed up the files in the first book I tried to add. Strangely, because in the folder on Google drive they are in perfect order. I tried to add files in small batches, tapping each download button one by one. First 12 or so files - the order, when checked in the book - was ok, but when I added a few more files to the same book - it went all over the place, mixing the files that have already been there! Sort this out, please. For an app with no free version - it's a piss-poor performance.