I use SwiftKey. I was skeptical about swipe typing at first, but it has completely won me over. I would struggle going back to regular typing now.

I am often communicating in two different languages at the same time and SwiftKey can handle suggestions without breaking a sweat. Apple has come out with their own swipe keyboard and I gave it a shot, but it is nowhere near good enough.

Specifically, the dual language suggestions are essentially non-existent and as far as I remember, the current language of typing was relatively front and center on the keyboard (there was a dropdown button to switch languages) instead of something the keyboard picks up from context like SwiftKey does. It also felt kind of ugly compared to SwiftKey.

But since Apple came out with their own swipe keyboard and as of recent I've read some articles about them planning to nerf the 3rd party keyboard APIs, I expect SwiftKey will pack up shop at some point. I just hope by that time the Apple swipe keyboard is usable, because I'll get arthritis from the regular keyboard with the amount of retyping one has to do while using it.