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LiquidText vs Skim: catalog facts
LiquidText	Skim
Freemium Free to install from the app stores; the homepage does not list the prices of paid…	Free Free and open source under the BSD licence.
Windows, macOS, iOS	macOS
Excerpts and notes can be arranged and linked on a workspace Suited to reviewing long documents	SyncTeX integration makes it the standard viewer for LaTeX work Annotation and snapshot tools designed for reading academic papers
Pricing is not clearly stated on the homepage Its workflow takes some learning compared with a plain PDF reader	macOS only Notes are stored in Skim's own format unless explicitly embedded
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: BSD-3-Clause
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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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