HOW-TO-INSTALL.txt

you should have already do these steps:
installed Termux (from play store)
installed Termux-API (from play store)

Started Termux app
  at the prompt, install php: $ pkg install php
    git clone https://github.com/pulketo/termux-cute-call
    cd termux-cute-call
    chmod +x cc.phar 
    ln -s $(pwd)/cc.phar ~/../usr/bin/cc
  done...so...
    cc john doe -f