If there's one app you rely on more than any other on your phone, it's probably the app that controls your on-screen keyboard. It's a funny sort of realization, I realize — 'cause a keyboard isn't typically something you even think about opening in any traditional sense. I mean, heck, keyboard apps don't even usually have icons in the Android app drawer! They're practically invisible, at least in terms of the way we tend to think about apps. But every time you tap out text into your device, you'd better believe it's the keyboard app you're using. And you'd better believe there's more to your phone's keyboard than what you see on the surface.