Not sure why you are downvoted this is entirely correct

Probably because most of us don't think it's correct at all.

TUI apps aren't common anymore, which adds to the confusion as a lot of people didn't grow up with them and don't grasp the difference. A TUI app takes control of the terminal and redraws different parts of the screen to present a consistent, non-scrolling experience. If you've ever used a system where your interface was an IBM 3270 emulator (or better, an actual 3270 terminal), that's TUI. vi/vim and non-GUI Emacs are also TUI.

A CLI app just prints its output at the cursor and the output scrolls off the top of the screen as you go. The Bourne, Korn, Bourne Again, and C shells are all CLI, as are most REPLs and the majority of interactive non-GUI UNIX programs (including ed) these days.