Compare software

Skim vs Foxit PDF Reader: catalog facts
Skim	Foxit PDF Reader
Free Free and open source under the BSD licence.	Freemium The reader is free. Foxit PDF Editor is a paid product.
macOS	Windows, macOS, Linux, Android, iOS
SyncTeX integration makes it the standard viewer for LaTeX work Annotation and snapshot tools designed for reading academic papers	Fast rendering with a full annotation and form-filling toolset for free Available on Windows, macOS, Linux, Android and iOS
macOS only Notes are stored in Skim's own format unless explicitly embedded	Editing page content requires the paid Foxit PDF Editor The installer and interface promote the paid products
Downloadable app	Downloadable app
Open source	Closed source
License: BSD-3-Clause	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 September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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