A free app for Android, by StarMedia.

This free and simple-to-use app allows you to listen to audio books at a speed that you prefer. With this, you can learn while listening to your favorite audiobooks and wake up more refreshed!

The app offers control options to let you adjust the speed of the audio as you’re listening. You can repeat or rewind as needed to help you remember the chapters or to get to the next/previous chapter. 

You can mark chapters and sections to make it easier for you to find them when you’re listening. If you’re preparing for an exam, you can listen to the audio book in a loop to practice your listening comprehension.