Apple promos on iOS apps are great, but they are even better when available on a productivity app instead of a game that one can easily lose interest on after a while. Today's offer is on one such title, it usually retails for $4.99 on the App Store, but can be downloaded for free right now for a limited period of time. Called TextGrabber, it's a powerful OCR translation app for iPhone, iPad and iPod touch devices. For those unfamiliar with the OCR bit, it basically allows you to quickly scan any printed material like a magazine, newspaper, or a document, and then have it translated into legible digital text that can be edited right on the iOS device.