Amazon has updated their popular Kindle app for iOS devices today, the company has announced. The new update brings several update that make the Kindle app more like the Kindle Fire tablet, and adds retina display support for the new iPad, which releases tomorrow.

Retina display optimization includes much-improved graphics with sharper fonts and sharper, brighter cover art for books in users’ library. The app also adds some features from Amazon’s popular Kindle Fire tablet including a redesigned library interface. The new app also includes the ability to switch easily between content stored on their device and content stored in the cloud.

Kindle for iPad users also have access to Amazon’s touch-optimized Kindle Store, which they access from their Safari browser. The Kindle app also includes several features Amazon has launched in recent months, including the ability to open PDFs from Safari or the Mail app, as well as send them to the cloud.

The Kindle app is a universal iOS app and is, as always, a free download from the iOS App Store. Check out some screenshots below, then let us know what you think in the comments.