# Quantum Mechanics vs Relatively Simple

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.

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.

## The numbers

| Metric | Quantum Mechanics | Relatively Simple |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (179 ratings)](https://appshunter.io/ios/app/quantum-mechanics-theories/id1159692911/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/relatively-simple/id1464624768/reviews)** |
| Number of ratings | **179** | 7 |
| Positive reviews | 43.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 50 MB | 434 MB |
| Requires iOS | 9.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vitalii Gryniuk](https://appshunter.io/developer/1007630419) | [Ira Rothstein](https://appshunter.io/developer/1464624767) |

## What reviewers say

### Quantum Mechanics

[App page](https://appshunter.io/ios/app/quantum-mechanics-theories/id1159692911)

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.

**Highlights:** Atomic structure theories, Models of various elements, Photon mechanism explanations, Gravity and electromagnetism concepts, Time and electricity principles, Mathematical algorithms

**Features:** macOS Compatibility

**In-app purchases:** none


### Relatively Simple

[App page](https://appshunter.io/ios/app/relatively-simple/id1464624768)

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.

**Highlights:** Experiential learning approach, Explains Special Relativity, Demystifies complex physics concepts, Designed by university professor, Accessible for general audience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Mechanics free?

Quantum Mechanics is free to download, with no in-app purchases.

### Is Relatively Simple free?

Relatively Simple is free to download, with no in-app purchases.

### Which has better reviews, Quantum Mechanics or Relatively Simple?

Relatively Simple is rated higher. Quantum Mechanics averages 4.5 out of 5 from 179 ratings, while Relatively Simple averages 5.0 from 7 ratings.

### Do Quantum Mechanics or Relatively Simple have ads?

Neither Quantum Mechanics nor Relatively Simple shows ads.

### Which is updated more often, Quantum Mechanics or Relatively Simple?

Quantum Mechanics ships an update every 3 weeks, and Relatively Simple monthly. Most recently, Quantum Mechanics was updated on November 6, 2026 and Relatively Simple on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*