Android app - audiobook (porting from iOS)

Simple app is needed for Android - audiobook player w/ optional text display. There is a reference app in iOS, that may be used. Requirements for app: - highly preferable to preserve inputs as in iOS version: 1) audio files are in m4a format. 2) chapters list and chapters text are listed in .plist file 3) use same graphics file (book cover jpeg's and icons) - optional book's text display: 1) if text enabled - display text and audio playback control 2) if text disabled - play audio from chapters list - must have an optional in-app purchase 1) disabled - downloaded app has all audio accessible 2) one purchase - downloaded app has 1st audio chapter accessible, single in-app purchase is required to unlock the rest of chapters 3) per-chapter purchase - downloaded app has 1st audio chapter accessible, and each other chapter should be purchased separate way - must have an optional iad - MUST have included some level of audio files protection. 1st version delivery - 7 days. Fixes and changes after review - in 4 days. Bugs to be fixed for free (of course).