Scripture App Builder is an exciting new program that will build an Android app containing text, images and sound, so that texts can be shared with smart phone users. It is capable of building apps from texts other than Scripture, such as local stories, health information or literacy materials. However, for non Scripture works, it is better to use Reading App Builder.
This page outlines how to use it with non-Scripture texts, and includes two short example folk-tale like books.
This page has some tips on using Aeneas for synchronizing text and audio.