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Atomic - Periodic Table vs Nucleus: catalog facts
Atomic - Periodic Table	Nucleus
Free Free and open source under GPL-3.0.	Free Free and open source under the GPL-3.0-or-later licence.
Android	Linux
Periodic table and element lookup in an Android app	Native GTK4 and libadwaita interface Includes isotope data for the elements
Android only	Linux only Small project with a single main maintainer
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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