Features
• Chromecast support.
• Playback speed control.
• Classification of books (new, started, finished).
• Download cover from the Internet.
• List of characters. You can manually create a list of characters to easier follow the story.
• Automatic pause in case you fall asleep. To continue playback just shake your phone.
• Playback history.
• Application Widget. Allows you to control the player from the home screen.
• By specifying a root folder containing all your audiobook, you can exclude your folders which contains music and other audio files.
• You don't have to finish one book to start another. The progress is saved independently for all books.

Full version

System Requirements:
Requirements: Android 11.0+

Home Page - https://play.google.com/store/apps/details?id=ak.alizandro.smartaudiobookplayer&hl=en