Spotify is continuing to add more ways for listeners to directly make purchases within its iOS app. Following on the streaming service‘s changes to make easier earlier this month, there’s now an an option for users to buy audiobooks in Spotify.

“Spotify submitted a new app update that Apple has approved: Spotify users in the United States can now see pricing, buy individual audiobooks and purchase additional ‘Top Up’ hours for audiobook listening beyond the 15 hours included in Premium each month,” the company said in its .

The wave of changes stem from the between Apple and Epic Games surrounding fees for purchases made outside the App Store. While things appear to be swinging in favor of app and service providers, Apple is likely to continue challenging the rulings even as it to allow for external payment options.