BookPlayer is an audiobook player that supports M4B, M4A, and MP3 formats. You can import your audiobooks using various methods such as AirDrop, Files, and iTunes. You can also drag and drop to sort your library, create playlists, and mark books as finished.

One of the best features of BookPlayer is its ability to control audio playback from the lock screen, control center, or from the companion app on the Apple Watch. You can play and navigate books with chapters, change playback speed, use smart rewind, and use volume boost. In addition, BookPlayer supports remote events from headset buttons and the lock screen, sleep timer with adjustable duration, and CarPlay support. Furthermore, BookPlayer has VoiceOver support and a dark mode for night owls.