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Kig vs Java Geometry Expert: catalog facts
Kig	Java Geometry Expert
Free Free and open source as part of the KDE applications.	Free The Flathub listing identifies it as GPL-3.0-or-later.
macOS, Linux	Linux
Constructions update live as you drag elements Extensible with macros and Python scripting	Combines interactive geometry with automated proving Diagrams can be changed dynamically
No Windows or mobile version listed Narrower in scope than GeoGebra	Linux package evidence is provided
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-3.0-or-later
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 September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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