Its quite easy to get rid of the address bars in iphone. You just need to edit the export-fs.html template, use window.scrollTo(1, 0) and set the window height to an extra 60 px. Works a treat. The same strategy will work to give full screen for Android, but I haven't done it yet as am too busy with iphone versions for now. Android is a bit trickier, as there are different heights of address bar.
If you use an app on iphone, you have to pay apple 30% of cost don't forget, and go through the pain of acceptance.