# Big O Notation vs Quantum Physics

The clearest difference is in-app purchases: Big O Notation at none against Quantum Physics's 1. Big O Notation also leads on ads (none vs shown) and iOS requirement (15.1 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Quantum Physics sells 1 one-off in-app purchase. Big O Notation asks for nothing beyond the download.

## The numbers

| Metric | Big O Notation | Quantum Physics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/quantum-physics-visual-lab/id6772756807/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 13 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Big O Notation

[App page](https://appshunter.io/ios/app/big-o-notation/id6771656290)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Quantum Physics

[App page](https://appshunter.io/ios/app/quantum-physics-visual-lab/id6772756807)

Explore the fundamentals of quantum physics through interactive visuals and simplified lessons. This app breaks down complex concepts like wave-particle duality and entanglement into easy-to-understand explanations and engaging simulations. Track your progress with quizzes and build your knowledge of atoms, photons, and quantum behavior.

**Highlights:** Interactive visual simulations, Beginner-friendly lessons, Lesson-based quizzes, Progress tracking and achievements, Glossary of key terms, Scientist timeline

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


## Frequently asked questions

### Is Big O Notation free?

Big O Notation is free to download, with no in-app purchases.

### Is Quantum Physics free?

Quantum Physics is free to download, with in-app purchases available.

### Do Big O Notation or Quantum Physics have ads?

Quantum Physics shows ads; Big O Notation does not.

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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.*