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UPDF vs Preview: catalog facts
UPDF	Preview
Freemium Free to try, with paid plans for the full feature set.	Free Included with macOS at no extra cost.
Windows, macOS, Android, iOS, Web	macOS
Apps for desktop and mobile platforms Editing, OCR, conversion and redaction in one app	Already installed on every Mac Handles both PDFs and images
Proprietary, with full features behind a paid plan The AI features rely on an online service	macOS only No advanced editing of PDF text or OCR tools like dedicated editors
Downloadable app, Web application	Downloadable app
Closed source	Closed source
License not stated	License: Proprietary
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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