iPhone App utilising OCR

We require an application for Apple mobile devices (iPhone, iPad, iTouch). The App will use the iPhone iPad camera, and will require OCR functionality. The App will need to be able to scan a document and extract pre determined keywords and or figures and save them to the app for emailing etc. The data saved will need to be recalled, edited and or added to if the OCR reads data incorrectly or the user wants to add additional information. The app is similar to the business card reader type iPhone Apps yet the objective it very different. We are also interested in cross platform for this app following the completion of the initial Apple App to Android, Blackberry, Apple OSX and Windows