How to Setup and Use Text Shortcuts on iPhone and iPad →

Text substitution in iOS, while not comparable to something like TextExpander, does have the advantage of being available to use in any app. Even in iOS 8, TextExpander snippets will require using a custom keyboard. 

Using iOS text substitution is still a great way to substitute abbreviations and characters for alternatives, and this guide over at iMore has some great tips. 

If for nothing else, specifying that the phrase "eml" should be substituted with my email address is one of the best hacks I've ever used and makes it so much easier to log into websites and apps.