***Warning*** Just upgraded the app on 3/24/22. Don't do it! Audible has eliminated the ability to buy books on sale or to pay with a credit card with the app upgrade. All have to be purchased with a credit. Some audio books could be purchased on for 1.99 or were free if you owned the Kindle book. Now you have to pay with a credit which has a higher value. I'm so disappointed they have eliminated that choice and will be looking for other options for future audio purchases.