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Slugline vs Highland Pro: catalog facts
Slugline	Highland Pro
Freemium Free up to six pages per script; longer scripts need the Unlimited Writing upgrade.	Freemium Distributed through the App Store; check the store listing for current pricing.
macOS, iOS	macOS, iOS
Automatic screenplay formatting as you type Drag-and-drop outline that moves the matching script text	Handles screenplays and prose manuscripts in one app Native apps for Mac, iPad and iPhone
Apple platforms only Scripts longer than six pages require a paid upgrade	Apple platforms only, no Windows or Android version Sync depends on iCloud
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is 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.