Compare software

Kalzium vs Atomic - Periodic Table: catalog facts
Kalzium	Atomic - Periodic Table
Free Free and open source as part of the KDE applications.	Free Free and open source under GPL-3.0.
Linux	Android
Detailed data for every element Molecular weight calculator and stoichiometry solver	Periodic table and element lookup in an Android app
Only Linux is listed as a platform Reference tool rather than a guided course	Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-3.0
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.