Could you expand on what you're talking about? I'm having a hard time picturing it but I'm interested.
Like this : https://youtu.be/D2XyP7iUErI at 00:17
I used Swiftkey for iOS recently, it’s no better than the built in option, and worse if you disable the spying “feature”.
Glide / Flow typing where you merely draw an approximate path of the shape that your typing would have followed.
It allows for very quick typing on a screen keyboard without the hammering of specific letters.