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Highland Pro vs Celtx: catalog facts
Highland Pro	Celtx
Freemium Distributed through the App Store; check the store listing for current pricing.	Freemium Free account available, with a 7-day trial of paid features.
macOS, iOS	Web
Handles screenplays and prose manuscripts in one app Native apps for Mac, iPad and iPhone	Script editors for many formats, including theater and games Storyboard and beat sheet tools
Apple platforms only, no Windows or Android version Sync depends on iCloud	Many features sit behind paid plans Requires an account
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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