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Combine PDFs vs PDF Expert: catalog facts
Combine PDFs	PDF Expert
Paid Sold through the developer's online store and the Mac App Store.	Freemium Reading and basic annotation are free. Editing features require a paid plan.
macOS	macOS, iOS
Drag and drop PDFs and images to build a new document Interleaves pages from two PDFs, useful for double-sided scans	Genuine text and image editing inside the PDF, not just annotation Very fast on large documents, with a polished Apple-native interface
macOS only Paid app with no free version mentioned	macOS and iOS only Editing, OCR and conversion require a paid subscription or licence
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
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 September 22, 2026

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