I can testify to scanning using an iPhone too, but using Microsoft Office Lens, it produces great results most of the time even in less than ideal circumstances such as poor lighting and not being exactly straight on to the document or photo. I use this for copies of all my important documents for emailing purposes (basically anything that isn't a solicitor's copy or otherwise has to be physically posted - both rare occurrences).
Edit: I also used my iPhone to scan my parent's and my last voyage menus from QE2 that I posted for the virtual world cruise.
