ZoomReader:

ZoomReader is an iOS app designed to provide persons who are blind or visually impaired with tools to enlarge, capture, or hear text read aloud.

The app uses the built-in camera on iOS devices to zoom in on text and images. Voice recognition enables hands-free image capture; Optical Character Recognition scans and converts imaged text into words you can listen to using text-to-speech.

Low-vision users can leverage ZoomReader to increase independence. The app's features enable users to look up phone numbers and TV listings; read pill bottles, price tags, or street signs; or scan restaurant menus without having to ask for help. This can be used as an assistive technology in the classroom.

https://itunes.apple.com/us/app/zoomreader/id414117816?mt=8