Amazon updated its Kindle application for iOS devices on Wednesday with support for PDF files as well as newspaper and magazine subscriptions. A Kindle user can now email a file to his or her Send-to-Kindle address and then access it from within the application, and the app will open Adobe PDF files sent to a computer through iTunes, from Safari or directly from an email account. Amazon also added support for viewing more than 400 newspaper and magazine subscriptions inside the application. The UI for reading periodicals was completely redesigned for the iPad, and it allows users to read newspapers, magazines and print replica text books the way they were meant to be read. The iPhone and iPod touch app also features a redesigned library for quick access to the Newsstand, Kindle Books and Docs. Ars Technica noticed however, that The New York Times currently limits its subscriptions to hardware Kindle devices only, which means anyone who pays for a subscription to that newspaper may have trouble loading it on an iOS device. The update is live now and is available for free from the iTunes App Store.