There's an inactive one-handed keyboard hidden inside iOS code
 

In these days of big iPhones, smaller-handed individuals have trouble typing up a storm on their iOS devices. However, since iOS 8 (at least), Apple has toyed with an edge-swipe activated one-hand keyboard. To keep characters closer to your thumb, it...

https://www.engadget.com/2016/10/21/...side-ios-code/