The Libby app is absolutely fundamental for library audiobooks. It's so smooth, honestly. You just link your library card, browse your local system's collection, and borrow anything available—no cost, obviously. Sometimes you get on a waitlist for popular titles, but you can suspend holds and manage everything so easily. I love that you can download for offline listening, and the playback speed controls are fantastic for those denser novels. The interface feels a bit basic compared to paid services, but for free? Unbeatable.
I occasionally switch to the Hoopla app too, because some of my libraries have different catalogs there. It's 'always available' so no waiting, which is a huge plus when you're in the mood for something specific right now. The selection can be more niche, but I've found amazing stuff I wouldn't have looked for otherwise. The main downside is borrowing limits, but between Libby and Hoopla, I've rarely run out of things to listen to. Honestly, my phone storage is the bigger issue.