As the suggests, you can use your phone as a scanning machine to scan pictures, documents, book covers and so on. This app is really a boon for people like me who have to email documents or print them on the go. The thing with cameras is however an expert you are in clicking photos you will end up either increasing the document size or u shall get slightly skewed image of your document. But with this app u can not only flatten the images but alsoake them seem more paper like and in printable form. Conversion of the images to pdf is another advantage as you can directly go for printing without any further editing. The only thing is that u have to bear with the footer mentioning that u have scanned from cam scanner which is not appropriate always.