[uxamanda]

This app is not exactly your idea but it is along the same lines. You "drive" towards the letter you want by shifting your finger. It is the most interesting text input I've ever seen and have always thought it would be cool with some sort of joystick input.

https://apps.apple.com/us/app/dasher-mobile/id1304772617

Edit: this link has a video: https://acecentre.org.uk/project/dasher-for-ios/

[willwade]

Ha! That’s me! If anyone wants to help dasher dev please get in touch. We need $$$ or some good c coders willing to spend a couple of months working on it all. It’s good. It’s the fastest text interface for eyegaze, head mouse or “continuous gesture”. We need it desperately for those who can’t speak

[uxamanda]

Woah, nice! I am definitely not a c coder, but I'm a UX designer. I've thought this project was cool for years and would be interested in helping out if my skills are ever of any use.