IOS native predictive keyboard for a third party app - Is it possible?

I am interested in building a keyboard iOS app. Important feature is the predictive text. I know there used to be a good SDK by Fleksy but is no longer available. So I wanted to know if there is a clever way to utilize the iOS native predictive function to my own app? I know it’s not allowed. So far all the third party apps for predictive SDK I came across are really crap. Any ideas?