How to smart read PDF files in android on a mobile screen?

I have a large PDF file in my phone that I want to read while in transit. I have the adobe app downloaded for this purpose but there is no smart read feature in it. I do not want to scroll the screen horizontally. Is there an app that I can use to do this? [Edit] I do not want the app to read it aloud for me. I just want to scroll vertically by myself with the contents of the file fitting the screen and the words still readable.