1. Kindle for iOS is not a dedicated audiobook app but you can use it to listen to audiobook companions.
2. Whispersync for Voice technology enables the user to switch between reading and listening.
Amazon Kindle is one of the most popular book-reading apps for iOS, staying in the Top 3 of the “Books” category almost constantly.
The app doesn’t offer an audiobook player feature as such, but it provides another exciting solution that gives the user the chance to listen to books.
Unlike Google Play Books or Libby (which can be either a book reader or an audiobook player), Kindle offers something much more flexible. It’s addressed to people who are not dedicated to audiobooks.
In the Kindle Store, you can buy an ebook and add an audiobook companion later – for a fraction of the audiobook’s regular price. Thanks to that, you have one book in two formats.

Whispersync for Voice technology enables the user to switch between reading and listening with a few taps. The last-read location is synced between book versions and your devices. You can start reading on the iPad on your way to work, and switch to listening on your iPhone in the evening.
Kindle app with the option to add audiobook companions is a good solution not only for readers who want to have a freedom of choosing the format that suits the mood, but also if you share your Kindle library with family members.
Make sure to read our guide to the best audiobook apps for iPhone and iPad.
Benefits: Ability to add audiobook companions for Kindle ebooks, Whispersync for Voice technology.
Compatibility: iPad, iPhone.
Price: Free.