All of my audiobooks are in Dropbox (pro). I cant fit them all on my iPhone all at once given the other stuff I want in my phone. Using Bound solves that problem and also frees up the space I was formerly using for the subset of books I did keep on my phone before. So far, all the features Ive wanted were present in the app. The song name shows up in Control Center just like with Audible or iBooks.
manducasexta about Bound - Audiobook Player, v1.1.0