WCAG 2.0: Beyond Web Content
Even though WCAG 2.0 isn’t designed to be used beyond web content, its technology agnostic nature and foundation in user needs means that we can use it as a tool for assessing iPhone/iPad apps, desktop apps and more.

Even though WCAG 2.0 isn’t designed to be used beyond web content, its technology agnostic nature and foundation in user needs means that we can use it as a tool for assessing iPhone/iPad apps, desktop apps and more.
iOS allows the user to switch to a “high contrast” display—essentially reversing the colour scheme. This doesn’t give the fine control of colours that a desktop operating system provides. With the use of a user style sheet and a slick bookmarklet, a user can apply a custom stylesheet to mobile Safari on their iPhone, iPad, or iPod Touch so that they can display the web site or application to suit their own styles.