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Fade In vs Trelby: catalog facts
Fade In	Trelby
Paid A paid licence is bought from the developer's website.	Free Free software under the GPL.
Windows, macOS, Linux	Linux
Automatic industry-standard screenplay formatting Tools for outlining, organizing and navigating a script	Enforces correct screenplay formatting and pagination Imports and exports Final Draft and Fountain files
Paid software with no free tier described Focused on scripts, so not a general-purpose word processor	Interface built with wxPython looks dated next to commercial tools No collaboration or cloud sync features mentioned
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.