There's an iOS accessibility engineer who's blind [1]. It's amazing how dedicated they are on accessibility features
[1] http://mashable.com/2016/07/10/apple-innovation-blind-engine...
[1] http://mashable.com/2016/07/10/apple-innovation-blind-engine...
The differences probably come more from the splintered android landscape and Apple's stricter review process.
Source: met him