A free program for Android, by o16i Apps.

Portuguese Reading is a great tool that will help you improve your reading skills. 

You can listen to audiobooks in the background while you are working, commuting, or anything else you are not doing. You can listen to audiobooks while you are driving, walking, or running.

You can choose the books to read from the list that you have. You can read the entire book or you can read a particular part of the book.

If you are a beginner in Portuguese, this app will help you a lot. It will teach you new words and sentences.