Some questions on ZoomReader

Does the app allow you to keep capturing photos of material without erasing pages you scanned before? Basically, could I use it to scan the pages of a book and have the app store them in it's memory until either I was ready to save the document or exit the app? Speaking of saving, if you can indeed do this, what formats does it support? It would be nice if there was Dropbox support in addition to being able to save captured text, but if I have to use iTunes' file sharing feature to get saved documents onto my computer, I can learn how to do that. Also, does the app have a way of letting you know what percentage of the document you're taking a picture is in enough focus to be easily OCRed? Basically, does it have something similar to the KNFB Reader? I don't even care if it's as simple as tonal indications, but something like that would be nice. Thanks, Shersey