It’s different though, you swipe to get to the other characters instead of clicking the button more often. T9 was awesome in its time, but it also kind of relies on a dictionary, like the swiping on “standard” smartphone keyboards. In ThumbKey you type every single character, but it is fast, if you internalize the layout.

ThumbKey made the difference for me. Completely new way to define touchscreen keyboards, but after some months now, I can type blindly on a touchscreen 👍. Caveat: in the beginning typing will be very, very slow.