Looking for Android audiobook apps? So best audiobook app for Andriod and iOS,Audible is one of the most popular audiobook apps. Audible has a large library of more than 200,000 titles. This makes it the best choice for audiobooks. These audiobook apps are free to download and you can start listening to audiobooks. These audiobook apps offer excellent audio quality, sleep timers, bookmarking, and trial and offline downloading options.