For years Apple and Adobe have been at odds over Adobe’s Flash Player. You cannot natively view flash animations on Mac iOS, which includes iPhones, iPods and iPads. What is at the root of this disagreement? Apple says it’s a security issues. The late Steve Jobs released a statement in April of 2010 laying out these reasons and citing Adobe’s software as “buggy”, “unstable” and “no longer necessary to watch video or consume any kind of web content”.
These stiff words were met with lots of criticism, with many of those critics accusing Apple of locking out Adobe to keep a grasp on their share of the app market.
You can read more details on this interesting debate here: http://en.wikipedia.org/wiki/Apple_and_Adobe_Flash_controversy