Beat was originally created for personal needs as every other screenwriting kind of sucked. Beat might suck too, but at its own terms.
The app is totally free and will remain so, most importantly because free creative software supports and enables new artists with different backgrounds. (And if you want to support the development, you can name your price for Beat at itch.io.)
Beat is originally based on Writer, a Fountain screenplay editor by Hendrik Noeller. The source code is released under GNU Public License, which means it will always remain open and public. And anyone can help with development!