https://www.applevis.com/blog/apple-assistive-technology-ios-apps-iphone-opinion/one-gadget-rule-them-all-why-iphone-makes
origin - http://www.pipiscrew.com/2017/10/one-gadget-to-rule-them-all-why-an-iphone-makes-sense-as-an-assistive-tool-for-the-blind/ one-gadget-to-rule-them-all-why-an-iphone-makes-sense-as-an-assistive-tool-for-the-blind