After the initial release of iOS 4.3 Apple delivered the technology to all the Safari flavours, desktop Macs, Windows and iOS devices. But native iOS Apps using the UI WebView element to render HTML and PDF files from within an application did not benefit from the long waited update for security reasons. Despite the rumours of Apple wanting to exclude the Nitro engine against Web Apps, the reason had to be found on the strong security requirements for code signing.
Our approach to digital magazines is now been recognized as the long term best strategy by Apple itself. NewsStand Kit, introduced with iOS5, does support multiple issues, notifications, background downloads for issues identified as a “bunch of HTML files” or even a .zip containing them.