: Some newer versions of the Kindle app include a Get Book button on listings. This button redirects you to a browser to complete the purchase, after which the book automatically syncs to your app library. Buy books and audiobooks on iPhone - Apple Support
Because of Apple's in-app purchase rules, you generally cannot buy books directly within the Kindle app or the Amazon shopping app. how to buy books on iphone
: Tap the Buy button (or Get for free titles) and confirm with Face ID, Touch ID, or your passcode. The book will immediately appear in your Library . 2. Using Amazon Kindle : Some newer versions of the Kindle app