The Booksonic Android App, based on DSub. - OBS: The code here might not be ready for release. Feel free to compile it yourself but if so I recommend searching for the latest commit with the description "Prepare for release".
I largely listen in the car, and would like the "car mode" like Audible has, where it makes the control buttons bigger, so you don't have to be as precise when you're driving.
From https://www.reddit.com/r/Booksonic/comments/t6oke2/car_mode/