Redability is an android app, that computes the Coleman-Liau index of the text. Its output approximates the U.S. grade level thought necessary to comprehend the text. You can import a text to an app from a photo, camera or just by selecting Readability option from a system selection context menu. This project was done as a final problem for Harvard CS50x class.
NOTE
To build this project you will need your very own google-services.json file.