Readdle has Scanner Pro (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE (regularly $6.99) for a limited time.

Scanner Pro transforms your iPhone and iPad into portable scanners. It allows you to scan receipts, whiteboards, paper notes, or any multipage document.

Scanned documents can be emailed and printed, uploaded to Dropbox, Google Drive and Evernote, or simply saved on the iPhone/iPad.

The application incorporates special algorithms that remove shadows, make scans sharper, correct perspective and make them as readable as possible.