So from reading the list of reasons for inaccurate results, it sounds like this library is totally useless for images taken with mobile phones, yet it is only allowed to run on mobile ;)

Now I would be more interested in an image correction library

".... Blurry images Handwritten or cursive text Artistic font styles Small text size (less than 15 pixels for Western languages, or less than 20 pixels for East Asian languages) Complex backgrounds Shadows or glare over text Perspective distortion Oversized or dropped capital letters at the beginnings of words Subscript, superscript, or strikethrough text"