See atoms as they really are.
A scientific 3D atom, molecule and particle simulator. Electrons are drawn as true quantum probability clouds, molecules use measured geometries, and you can zoom from a water molecule down through the nucleus to quarks and gluons — at true scale. The quantum lab then lets you run the experiments behind it all, from the double slit to entangled pairs and qubit circuits.
New in 1.1: the quantum lab. Every edition is unlocked for 14 days. Pro and Premium are one-time purchases with a year of updates.
Zeff (2p) 3.136 (Clementi–Raimondi)
Lens Schrödinger · |ψ|²
|ψ|² = 0.0184 e/ų
Nearest node: 2s radial · 0.61 Å
Real physics behind every pixel.
Hydrogen-like orbitals with Clementi–Raimondi effective nuclear charges give every element real electron clouds. Molecules are built from NIST CCCBDB experimental geometries with LCAO bonds. Nuclei and particles follow the PDG 2024 tables and CODATA 2022 constants.
Electrons as probability clouds
Every orbital is rendered as its |ψ|² density — s, p, d and f shapes with real radial nodes — not as planets on rails. Switch to the classical view whenever you want the familiar picture.
All 118 elements
Periodic table and element inspector: configuration, ionisation energies, radii, isotopes, electronegativity and the emission lines that give each element its colour.
40+ real molecules
Water, benzene, caffeine, ATP and more at measured bond lengths and angles. Calipers give bond length, angle and dihedral; the dipole meter shows partial charges and the net dipole.
The complete Standard Model
Quarks, leptons and bosons with mass, charge, spin and colour from PDG 2024. Open any hadron and see its valence quarks with gluon flux tubes between them.
Spectrometer and energy levels
Real emission lines for every element, a Rydberg calculator for hydrogen-like transitions and an energy-level diagram you can click to trigger a transition.
Nuclear instrument
Binding energy per nucleon, the semi-empirical mass formula, half-lives and complete decay chains down to a stable isotope.
Molecular dynamics
Run a thermostatted simulation and watch vibrations, rotations and collisions with live temperature, kinetic and potential energy readouts.
Reaction sandbox and mass spectrometer
Balance any equation, see the enthalpy of reaction, and send a molecule through the mass spectrometer for its fragment peaks and isotope pattern.
Composition builder
Assemble molecules from atoms, hadrons from quarks with colour-neutrality checks and a mass model, nuclei from nucleons and ions from atoms — the app tells you what is physical.
Hybridisation and interaction graph
See sp, sp², sp³ hybrids form, and a live graph of the four fundamental forces acting between the particles in view.
Unit-aware physics calculator
CODATA 2022 constants, eV to joule to kelvin to wavelength, with units carried through every expression.
AI assistant and lab notebook
Ask Andromeda Nova about what you are looking at, then keep measurements, screenshots and notes in a notebook you can export.
Run the experiments behind the clouds.
Twelve live instruments in their own dock section. The Schrödinger equation is solved numerically — Crank–Nicolson in one dimension, split-step Fourier in two — and every solver checks itself against exact results in Model & sources. Measurements are drawn from the Born rule, one outcome at a time. The theory lenses in the top bar carry over: under the pilot-wave lens the double slit shows Bohmian trajectories, under many-worlds it shows the branches.
Wave packets and tunnelling Pro
A Gaussian packet spreads, reflects and tunnels through barriers and wells for an electron, a neutron or a C₆₀ molecule, with ⟨x⟩, ⟨p⟩, Δx·Δp ≥ ħ/2 and the transmission against the exact T(E).
The double slit, particle by particle Pro
The 2D wave passes the slits and the screen fills one detection at a time until the fringes appear. Add a which-path detector and they fade exactly as V = √(1 − D²) predicts.
Stationary states Pro
Type any potential and get its bound states and energies: harmonic oscillator (n + ½)ħω, the infinite well and the tunnel splitting of a double well.
Stern–Gerlach and the Bloch sphere Pro
Send silver atoms through chained magnets and watch Z → X → Z give 50/50 again. Drive a qubit with Rabi and Ramsey pulses and measure it along any axis.
Bell test, teleportation, eraser, Zeno Premium
Entangled pairs reach S = 2√2 against the local bound of 2; teleport a state with fidelity 1; sort quantum-eraser coincidences into fringes and anti-fringes; freeze a transition by watching it.
10-qubit circuit builder Premium
Drag gates onto up to ten qubits, see the exact state vector and the Q-sphere, sample shots, and run Bell, GHZ, Deutsch–Jozsa, Grover, the QFT and Shor’s algorithm for 15. Export and import OpenQASM 2.0.
Interpretations, side by side Premium
One double-slit run read as Copenhagen, many worlds, pilot wave, decoherence and QBism. The predictions are identical in every reading, and the instrument says so.
One atom. Six ways physics has seen it.
A lens re-renders the same object in a theory's own visual language. Compare them side by side and see what each one explains — and what it leaves out.
Bohr orbits
Electrons on quantised circular orbits with the energies that first explained the hydrogen spectrum. Includes everything Bohr got right — and shows where it stops working.
Schrödinger clouds
The default view: |ψ|² densities for every orbital, with nodes, phases and the shapes that make chemistry work.
De Broglie–Bohm pilot wave
A definite particle guided by the quantum potential, drawing real trajectories through the same wavefunction.
Many worlds
Every measurement branches the scene. A Stern–Gerlach beam of the element you picked splits into 2J+1 worlds from its real ground level — silver into 2, chromium into 7, helium not at all — weighted by the Born rule.
Quantum field theory
Particles as excitations of fields, with Feynman diagrams for the interactions you trigger and the photon exchange holding the atom together.
String theory speculative
Zoom past the quarks to the Planck scale and every particle becomes a vibrating string — counted for the element you picked (uranium-238: 330 up and 384 down quarks, 92 electrons). Clearly labelled as speculative: it is an idea, not a measurement.
From molecule to the Planck length.
The scale instrument keeps the ratios honest as you zoom. Nuclei use R = 1.2 fm · A1/3; inside, nucleons resolve into valence quarks with colour charge and gluon flux tubes from QCD. Below that the app says so: nothing smaller than a quark has ever been measured.
Measured where measured, modelled where modelled
Orbitals, geometries, constants, particle properties and spectral lines come from published references and are cited in the app. Anything beyond experiment — pilot-wave trajectories, branching worlds, strings — is marked as an interpretation or a hypothesis.
Proton · uud · colour-neutral ✓ m = 938.272 MeV/c² (PDG 2024) q = +1 e r_ch = 0.8414 fm Flux tubes: 3 · string tension ≈ 0.9 GeV/fm Lens: QFT → Feynman diagram: γ exchange
Pay once. Keep it forever.
Start with a 14-day free trial with a 14d.space account — everything unlocked, no card needed. Then Pro €49 or Premium €99, one-time. Every licence is perpetual and includes a year of updates. Andromeda Atom runs with your 14d.space account in the browser and on the desktop; there is one trial per account.
14-day trial
For a first look at every instrument.
- Everything in Premium, unlocked for 14 days
- One trial per 14d.space account, shared by the desktop and browser versions
- Free account, no card required
- Afterwards: Pro €49 or Premium €99, one-time
Pro Most popular
For students, teachers and the curious.
- All instruments, unlimited use
- Classical and Schrödinger rendering
- All 118 elements and 40+ molecules
- Spectrometer, calipers, nuclear instrument, calculator
- Quantum lab: wave packets, tunnelling, stationary states, double slit, Stern–Gerlach, Bloch sphere
- Lab notebook
Premium
For researchers and lecturers.
- Everything in Pro
- All theory lenses: pilot wave, many worlds, QFT, strings
- Subatomic QCD view: quarks, colour, gluon flux tubes
- Composition builder, molecular dynamics, mass spectrometer, reaction sandbox
- Quantum lab: Bell test, teleportation, quantum eraser, Zeno effect, 10-qubit circuit builder with Grover and Shor, interpretations side by side
- AI assistant (Andromeda Nova)
- XYZ / CSV / OpenQASM / PNG / notebook export, priority updates
Your Andromeda Atom order
Find your purchases and original keys in your account. Sign in with the email used at checkout.
Checking payment and licence delivery…
Open Andromeda Atom (desktop or in your browser) and sign in with the 14d.space account for the email you used at checkout — your licence is applied automatically. To use it with another account, choose Activate licence key and paste the key once; a key belongs to one 14d.space account. Keep a copy of the key and your Stripe receipt.
Prices in EUR. Any applicable tax is shown at checkout.
| 14-day trial | Pro | Premium | |
|---|---|---|---|
| Probability-cloud and classical rendering, 118 elements, 40+ molecules | ✓ | ✓ | ✓ |
| Periodic table, particle table, spectrometer, energy levels, density probe | ✓ | ✓ | ✓ |
| Calipers, dipole meter, hybridisation viewer, nuclear instrument, calculator | ✓ | ✓ | ✓ |
| Interaction graph of the four forces, scale instrument, lab notebook | ✓ | ✓ | ✓ |
| Unlimited use after 14 days | – | ✓ | ✓ |
| Theory lenses beyond classical and Schrödinger | 14 days | – | ✓ |
| Subatomic QCD view: quarks, colour charge, gluon flux tubes | 14 days | – | ✓ |
| Composition builder, molecular dynamics, mass spectrometer, reaction sandbox | 14 days | – | ✓ |
| AI assistant, XYZ / PNG / notebook export, priority updates | 14 days | – | ✓ |
Install Andromeda Atom
One installer for every edition. Sign in with your 14d.space account: a new account starts its 14-day trial, a purchase made with your account email unlocks Pro or Premium. The desktop app needs a graphics card or integrated GPU with up-to-date drivers; the browser version runs anywhere WebGL 2 does.
Checking for the latest tested release…
Windows
Windows 10 or 11 · x64 · .exe installer
Windows download unavailableRun the setup file. It adds Andromeda Atom to the Start menu and desktop. Uninstalling keeps your settings, notebook and licence.
Linux
x86_64 · .deb package or AppImage
Linux download unavailableInstall the .deb with your package manager, or make the AppImage executable and run it.
Browser
Any modern browser with WebGL 2 · nothing to install
Open Atom in your browserThe same simulator, served from 14d.space. Sign in with your 14d.space account; nothing you build is uploaded.
Download SHA256 checksums · Verify the file before running it.
Before you install
Are the electron clouds real calculations?
Yes. Each orbital is a hydrogen-like wavefunction with the Clementi–Raimondi effective nuclear charge for that element and subshell, sampled into a density volume. Bonds use linear combinations of these atomic orbitals. It is a teaching-grade model, not a full Hartree–Fock or DFT calculation, and the app says so in the inspector.
What is in the quantum lab?
Twelve instruments in their own dock section (new in Andromeda Atom 1.1): wave packets and tunnelling, stationary states, the double slit, Stern–Gerlach and the Bloch sphere in Pro; the Bell test, teleportation, the quantum eraser, the Zeno effect, the 10-qubit circuit builder and the interpretations comparison in Premium. The experiment fills the main view and its controls and physics notes sit in the side panel; press Esc to return to the 3D atom.
Is the double slit an animation?
No. The wavefunction is integrated with the split-step Fourier method on a 2D grid with hard slit walls, and every dot on the screen is drawn from |ψ|² at the screen. The fringe spacing, the visibility and the loss of fringes with a which-path detector come out of the calculation and are checked against the exact formulas.
Where do the molecule geometries and constants come from?
Molecular geometries come from the NIST Computational Chemistry Comparison and Benchmark Database (experimental values). Particle properties follow the Particle Data Group 2024 review, and physical constants are CODATA 2022. Every value shows its source.
Is the string theory lens science?
It is a hypothesis with no experimental confirmation, and the app labels it speculative wherever it appears. The same goes for the pilot-wave and many-worlds lenses, which are interpretations of quantum mechanics rather than separate predictions.
What does the browser version need?
A browser with WebGL 2 and a 14d.space account. It is the same application, served from 14d.space; your work stays on your device. The desktop version adds native file export and automatic updates.
Do I need a 14d.space account?
Yes. Andromeda Atom runs only with a signed-in 14d.space account, in the browser and on the desktop. Each account gets one 14-day trial with everything unlocked, shared by both versions; afterwards Atom asks for Pro (€49) or Premium (€99). Purchases made with your account email are applied automatically, and you can activate a licence key on your account once. Manage your signed-in computers at your account.
Does the desktop app work offline?
Yes. After you sign in, the desktop app works offline for 7 days at a time and renews its sign-in automatically whenever it is online.
Does the AI assistant cost extra?
No. The Premium assistant is answered by Andromeda Nova, and Andromeda never bills you separately for it. The desktop app works fully offline without it.
How do updates work?
Andromeda Atom checks 14d.space for a newer verified release shortly after it starts and every four hours, and installs it when you close the app (Windows) or the next time you open it (Linux). Only packages signed by 14d.space are accepted. The browser version is always current.
What happens after the update year?
Your licence keeps working forever with every release from your update year. Nothing stops, nothing expires.