SharpScan is a free (with in-app purchase options) iOS app that makes document scanning a snap. Select your camera to snap a document or choose an image with text already saved in your camera roll, and you'll quickly get a sharp image of your document. The app helps knock out noise, shadows and those inevitable distortions that arise from shooting at a slightly off-center angle.
The image can be cropped manually or automatically. Scanned documents are then shareable as an image file or a PDF. The free version is ad-supported, and it also adds an unobtrusive watermark to your scanned images. You can upgrade to the pro version for US$2.99.
I ran SharpScan through a variety of