SwiftKey Suggestions

* Custom themes - the architecture is already there; just store the themes on the SD card instead of in the app data folder, so you don't need root! Very easy fix.

* Multiple profiles - should be obvious, basically everything one profile "learns" will be kept separate from the others. Useful for multiple users (more common with tablets), or you could have "personal", "work", etc.

* "Read-only" mode - tell SwiftKey not to learn anything, on a temporary basis of course. You could toggle it via an optional switch on the keyboard. Predictions will still work, but it won't actually keep track of what you type. Ideally you could configure it to automatically use this mode in certain apps (I have an idea of the kinds of apps a lot of people would probably use it for.) Useful if you're doing something private and don't want to risk anyone else seeing it if you let them borrow your phone.