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Dictionaries vs Wordbook: catalog facts
Dictionaries	Wordbook
Freemium Free download, with a paid purchase offered on the site.	Free Free and open source under the GPL-3.0-or-later licence.
macOS	Linux
Works inside any app through macOS Look Up Over 80 languages with pronunciation audio	Works fully offline Pronunciations through eSpeak
Translations are to and from English macOS only	English only Linux only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
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 October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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