It provides the format automation tool that automatically formats the script as required. It offers different export options to make it the preferred format. It provides a tracking feature to get an insight into writing habits.

Trebly is a great option for a free basic screenwriting software

Its formatting feature is best it helps me to format the characters and the content written. It provides a script analysis tool that analysis the errors in the script. It has a feature to export the script into Pdf and files.