Hailed by many as the "best scriptwriting software" out there, Final Draft has definitely managed to become the "de facto" standard in screenwriting applications. Its native format fdx is supported by almost any other screenplay writing software. It's available for Mac, PC, and also on iPad and iPhone. It is a fully-fledged professional screenwriting app, including features such as outlining, production reports, revisions, and much more. It delivers a professional screenplay layout. See reviews and tutorials on how to use this script writing software effectively.