"Copy emails, documents, web pages, PDF files, and more; paste them into Speak it!, and have the text spoken back to you..." This is from the Details page of the app. I did not download it.
In any case, (going back to the topic...) this is very far from hacking. Hacking is finding new ways to use or achieving new results with existing tools, outside the intended design or outcome of the tools. To accomplish this, a hacker needs: a.) enough knowledge with the tools and b.) enough creativity to not be limited by existing tools. So knowledge does have a part here, and not a small part.