If you want a replacement you can use `telnet telehack.com` and then run `starwars`. If you want it in a single command you can do something like `zsh -c '{ sleep 1; echo starwars; sleep 10000; } | nc -c telehack.com 23'`.
It makes me think that "web apps" ought to have a distinctive dotted suffix like a file extension, like "example.com/main.app", to set expectations with the user.
[0] https://en.wikipedia.org/wiki/Lynx_(web_browser)