The best (and only) Android audiobook player for Plex

Features:

★ Sync audiobook progress on device
★ Sync progress across devices via your Plex server
★ Compatible with all common audiobook file formats (mp3, m4b, FLAC, and more)
★ Sleep timer
★ m4b chapter support
★ Skip silent audio

Premium Version Features:

★ Offline support
★ Variable playback speed (0.5x to 3x)