<ul data-eligibleForWebStory="true">Barnes & Noble updated its Nook app for iOS with a 'buy on BN.com' button for e-book and audiobook purchases.The button redirects users to Barnes & Noble's website, syncs purchases to the Nook app and connected devices.Previously, iOS users had no clear purchase path, but the new system mirrors changes in Amazon's Kindle app.This update comes after a court ruling involving Epic Games and Apple, prohibiting blockage of external purchase links.Apple's App Store guidelines previously mandated the use of their in-app purchase system.The ruling has allowed e-reader apps like Barnes & Noble and Kobo to offer more seamless purchasing experiences.The Nook app update aims to simplify the process for users and offer a direct link to buy content.Similar external purchase options have been added by Spotify and Amazon's Kindle app.After the purchase on BN.com, the content is automatically synchronized to the Nook app and devices.Apple was ordered to stop blocking external purchase links and imposing commissions on them.The new Nook app feature enhances user experience by providing a clear path to acquire e-books and audiobooks.The court ruling has led to improved purchasing processes in e-reader apps, benefiting customers.Kobo has also implemented comparable functionality in response to the court ruling.This change reflects a wider trend of increased flexibility in purchase options within iOS apps.The article 'Barnes & Noble Nook iOS App Gains Purchase Links' was first published on MacRumors.com.Readers can discuss this article on the MacRumors forums.