Unlimited Elements

The periodic table, and everything underneath it.

macOS iOS iPadOS

Every element, every isotope, and the physics underneath them — made to be read for pleasure and precise enough to work from. No network, no account, and no advertisements between you and a fact.

The table

• All 118 elements — atomic mass, electron configuration, oxidation states, electronegativity, radii, and the temperatures where each changes state.
• Colour by any property — melting point, density, abundance, discovery year, electronegativity. The periodic trends appear across the table.
• A page per element — where it occurs, how it is obtained, what it is used for, and who found it.
• The physics underneath — spectral lines, electron orbitals, crystal structure, and thermodynamic data.

Isotopes and decay

• Every known isotope — half-life, decay modes, branching ratios, and daughter products.
• Follow a decay chain — step by step, from parent to the stable end.
• A chart of nuclides — pan and zoom, coloured by half-life or by decay mode.
• Binding energy per nucleon — and why iron sits where it does.

Do the chemistry

• Balance an equation — get the coefficients, with the reasoning shown.
• From any formula — molar mass and percentage composition.
• Working calculators — stoichiometry, solution concentration and dilution, gas laws, pH, and electrochemistry.
• Look it up — solubility rules, a glossary, physical constants, and a quiz to keep you honest.

Two depths, one app

• Beautiful and exact at once — a reference you leave open, with the numbers sourced and cited.
• For a curious ten-year-old and a working chemist — the same app, at two depths.
• Completely offline — every value ships in the app. Nothing is fetched.

One purchase, every device