Type Nine looks awesome! I just bought it. I've become increasingly frustrated with the default iPhone keyboard and looking for something more reliable and deterministic.
Your onboarding tutorial was excellent. Much more thorough and polished than I expected. One issue: I advanced through all the tutorial screens until the end of the "manual" tutorial, but it wasn't obvious that was the end because there was no "next tutorial" or "quit tutorial" button after watching the "see how" animation.
Feature request: include emojis in the suggestions like the iOS keyboard does: when you type "heart", it offers a suggestion to replace the word "heart" with the heart emoji.
I see there's a T9 keyboard app (RetroBoard) for the Apple Watch. Have you looked into supporting Type Nine on Apple Watch?