Im desperate to get my PNG files into iOS with their trancparency preserved so i just bought that app but it doesn't work, I only have a save to photo library button and I can't find any of he options you mention :-(
After a great deal of investigation, I'm not sure it's even possible, by all accounts ths is an iOS problem, it can't deal with transparencies. My photos already have a transparent background before and, it's putting them on iOS that screws them up.
Some people have had limited success using copy and paste, but that's not much use if you only have the option to select a picture from the library :-(
Really annoyed Apple hasn't fixed this and I'm wasting money trying to fudge it