I was mainly using Literature & Latte's paid app Scrivener for years, but recently the free open source app Joplin has become my primary drafting environment. I

I was mainly using Literature & Latte's paid app Scrivener for years, but recently the free open source app Joplin has become my primary drafting environment. I still recommended both -- I use Scrivener for capturing research, organizing projects, and producing publisher-ready files.