With built-in accessibility features, accessibility APIs, and developer tools, iOS provides an extraordinary opportunity to With built-in accessibility features, accessibility APIs, and developer tools, iOS provides an extraordinary opportunity to deliver a superior mobile experience to every customer, including those with special needs. Award-winning features include VoiceOver—the revolutionary screen reader for blind and low vision users, Switch Control, playback of closed captioned or audio described video, Guided Access, Text to Speech, and more.

https://developer.apple.com/accessibility/ios/