Three Apps

SwiftKey Keyboard is a smart keyboard that learns from you, replacing your
device’s built-in keyboard with one that adapts to the way you type. The app
learns your writing style to give you super-accurate autocorrect and
intelligent next-word prediction, reducing keystrokes and getting smarter
over time.
https://itunes.apple.com/app/swiftkey-keyboard/id911813648

SwiftKey Neural Alpha is an experimental keyboard app that uses artificial
neural networks to predict and correct your typing.
https://blog.swiftkey.com/neural-networks-a-meaningful-leap-for-mobile-typing
https://play.google.com/store/apps/details?id=com.touchtype.swiftkey.nn

Swype's patented technology enables users to input words faster and easier
than other data input methods at over 40 words per minute.
http://www.swype.com

Swype vs SwiftKey Flow
http://www.yaabot.com/8721/face-off-swype-vs-swiftkey-flow