The Kindle Unlimited program offers a free 30-day trial of eBooks.
The company has made it available to more than 400 million people in the U.S. The program, known as Kindle Unlimited, was launched in July 2018.
The service includes unlimited ebooks and audiobooks.
If you sign up for the service, you get a trial of the eBooks you purchase for free.
The trial lasts 30 days and can be extended.
The free trial lasts until March 31, 2019.
The book and audiobook service includes an Amazon Prime subscription.
Amazon Prime customers can also buy the Amazon Kindle app.
Amazon has said it will offer an “upgrade” for people who already have the app.
If an upgrade isn’t available, users can buy an annual Amazon Prime membership, which comes with a free Kindle app and Kindle books.
Amazon doesn’t charge a monthly fee for Prime customers, but the company does offer a $10 annual membership fee.
If Amazon is selling the Kindle app, it’s probably a good time to buy an Amazon Kindle, as that will likely be a big selling point.