How access works
Learn and explore chemistry.
Periodic Table, 118 element pages, Explore, 3D viewers, Element Compare, Molar Mass, Dilution, Scientific, Unit, Ideal Gas, pH.
Save, organize and continue learning.
Everything in Open Lab, plus Study Library, notes, Study Sets, manual flashcards, calculator history and study progress. After the 30-day trial the account remains Free.
Solve, simulate, analyze and experiment.
Chemistry Solver, Reaction Workbench, stoichiometry and thermodynamics, advanced compare, saved lab sessions, Smart Review, Focus Review, Study Insights, automated practice, no ads.
New accounts: Free account + 30 days of Pro automatically. No card required to start the trial. After the trial, the account remains Free.
§ 01 Plans
Atomurus Free
Build your study system
billed annually
§ 02 Compare plans
| Feature | Free | Pro |
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§ 03 How Smart Review works
§ 04 What stays free
The periodic table, element pages, Explore articles, 3D viewers, molar mass and dilution, and other basic calculators stay open — no account required. A free account saves your library, notes and Study Sets. Pro is for solving, analyzing and Smart Review. Billing should never become a wall in front of the table.