Quantum Mechanics vs Relatively Simple
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quantum Mechanics
Explore various theories on the model and structure of atoms. This app details concepts like atomic postulates, photon mechanisms, and models for hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, and oxygen. It also covers related physics principles such as gravity, electromagnetism, and time.
- Atomic structure theories
- Models of various elements
- Photon mechanism explanations
- Gravity and electromagnetism concepts
- Time and electricity principles
- Mathematical algorithms
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Different theories about model and structure of atoms. Contents: - Set variables - Postulates - Mechanism of photons - (H) Hydrogen model - (H₂) model - (H₃) model - (H₄) model - (He) Helium-4 model - (He) Helium-5 model - (Li) Lithium-5 model - (Li) Lithium-6 model - (Li) Lithium-7 model - (Be) Beryllium-7 model - (Be) Beryllium-8 model - (Be) Beryllium-9 model - (Be) Beryllium-10 model - (B) Boron-8 model - (B) Boron-9 model - (B) Boron-10 model - (C) Carbon-10 model - (C) Carbon-11 model - (C) Carbon-12 model - (C) Carbon-13 model - (N) Nitrogen-11 model - (N) Nitrogen-12 model - (N) Nitrogen-13 model - (N) Nitrogen-14 model - (O) Oxygen-13 model - (O) Oxygen-14 model - (O) Oxygen-15 model - (O) Oxygen-16 model - (O) Oxygen-17 model - Flame (2 H₂ + O₂ > 2 H₂O) - Point of gravity - The sun doesn't shine and warm - Rays of cold - Climate control - Fifth Element - Excess energy - Electromagnetism - Gravity, Coulomb's law - Capacitor. Law of equilibrium - Atom - Radiowaves, Light, X-rays - Just Gravity - Just Gravity 2 - Just Gravity 3 - Time - Electricity - Time Mathematics - Sin approximation algorithm
Relatively Simple
This app offers an experiential explanation of Einstein's theory of Special Relativity. Designed by a Carnegie Mellon University professor, it breaks down complex concepts like spacetime and E=mc^2 for a general audience.
- Experiential learning approach
- Explains Special Relativity
- Demystifies complex physics concepts
- Designed by university professor
- Accessible for general audience
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When people hear the term "Einstein's theory of Special Relativity", they automatically assume its above their heads. You hear terms like "Space Time" and the famous equation "e=mc^2" and it sounds way too abstract to understand for someone without a PhD in Physics. Designed by Carnegie Mellon University's Dr. Ira Rothstein, this app is aimed at experientially explaining Einstein's theory of special relativity to anybody.
Screenshots
Verdict
The clearest difference is review sentiment: Relatively Simple at 100% against Quantum Mechanics's 43%. Relatively Simple also leads on rating (5.0 vs 4.5). Quantum Mechanics's advantage is ratings volume (179 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Relatively Simple holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Quantum Mechanics has 179 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 43% of Quantum Mechanics's written reviews are positive against 100% of Relatively Simple's.
Quantum Mechanics ships an update every 3 weeks, Relatively Simple monthly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Quantum Mechanics | Relatively Simple |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (179 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 43.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 179 — better | 7 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 434 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitalii Gryniuk | Ira Rothstein |
Customer experience
Quantum Mechanics
Relatively Simple
In-app purchases
Quantum Mechanics
No in-app purchases
Relatively Simple
No in-app purchases
Questions
Is Quantum Mechanics free?
Is Relatively Simple free?
Which has better reviews, Quantum Mechanics or Relatively Simple?
Do Quantum Mechanics or Relatively Simple have ads?
Which is updated more often, Quantum Mechanics or Relatively Simple?
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