ElectronOrbital vs QM Simulator
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
ElectronOrbital
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This app visualize the probability of existence of an electron using the wave function, which is a solution to the Schrodinger equation. The electron orbitals of hydrogen atom appear in vivid colors. s orbit, p orbit and d orbit are displayed.
QM Simulator
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QM Simulator is a hands-on quantum physics atlas: 54 interactive simulation modules spanning the full arc from quantum foundations to quantum information, paired with 47 bilingual articles. Every computation and rendering happens on your device β no network, no sign-up. WHAT YOU CAN DO β’ Play with parameters: adjust slit spacing, raise a potential barrier, tune cavity coupling β every chart recomputes in real time. β’ Learn by level: Basics β Advanced (perturbation, degeneracy, radiation) β Topics (Bell inequalities, quantum error correction, Grover's algorithm), from high-school extension to university QM. β’ Read linked notes: each article is tied to its simulation, with formulas and figures side by side β switch between Chinese and English anytime. β’ Explore freely: Bloch sphere, hydrogen wavefunctions, blackbody radiation, Compton scattering, KronigβPenney, BB84 quantum key distribution β from Planck's 1900 hypothesis to today's quantum computing. WHO IT'S FOR β’ Physics students: turn textbook formulas into images you can see and manipulate. β’ Educators & researchers: validate intuitions and demonstrate in class. β’ The curious: no derivation skills needed β dial the parameters and build quantum intuition. HIGHLIGHTS β’ 54 simulation modules, all driven by real physics computation (not pre-baked animations). β’ 47 in-depth articles, fully bilingual, with figures and code. β’ Fully offline: no ads, no purchases, no tracking, no account required. β’ Chinese & English UI, follows system language. Educational use: QM Simulator works as a lecture-demonstration companion for quantum mechanics courses.
Screenshots
Verdict
The clearest difference is price: QM Simulator at Free against ElectronOrbital's $0.99. ElectronOrbital's advantage is iOS requirement (14.4 vs 17.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
QM Simulator is free to download; ElectronOrbital costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ElectronOrbital | QM Simulator |
|---|---|---|
| Price | $0.99 | Free β better |
| Update frequency | Every 2 months | β |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 14.4 β better | 17.0 |
| Further details β not scored | ||
| Size | 1 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Takao Akatsu | ι ι |
In-app purchases
ElectronOrbital
No in-app purchases
QM Simulator
No in-app purchases





