I made an app called Syncpod. Its a app where you can listen to your audiobooks local or from your audiobook shelf server. It also supports Podcasts, Ambient sounds, Music, E-Books (With Neural voice TTS reader) World Radio and Comic books. It has chapter support and you can exclude things you dont wat to see in the app like podcasts, or audiobooks and so on.
From health and workouts to productivity and bills, Listifyer combines over 20 apps into one powerful organizer. It runs entirely on your device with local storage, no internet required. You get access to it all, but you decide what to keep in view.