This is an app that Harry McCracken talks about in Time Magazine, April 8, 2013. Ask the Expert.
“Scanner Pro($6.99, iPhone). This program lets you snap pictures of printed documents with your phone’s camera then upload crisp, cleaned-up digital versions to cloud services like Dropbox. I use it for every receipt I submit as part of an expense report, and it’s the least onerous part of that dreaded process.”