# Physical Constants vs Learn Quantum Physics Pro

The clearest difference is price: Physical Constants at Free against Learn Quantum Physics Pro's $1.99. Physical Constants also leads on review sentiment (33% vs 0%). Learn Quantum Physics Pro's advantage is rating (4.5 vs 3.3) and ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Physical Constants is free to download; Learn Quantum Physics Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Quantum Physics Pro holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Learn Quantum Physics Pro has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 33% of Physical Constants's written reviews are positive against 0% of Learn Quantum Physics Pro's, so the app with the better star average is not the one people write more warmly about.

Physical Constants ships an update every 9 months, Learn Quantum Physics Pro every 11 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Physical Constants | Learn Quantum Physics Pro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews) | **[4.5 (24 ratings)](https://appshunter.io/ios/app/learn-quantum-physics-pro/id6448938746/reviews)** |
| Number of ratings | 3 | **24** |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 months** | Every 11 months |
| Monetization | **Ad-supported** | Paid |
| Size | 25 MB | 35 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [Haroon Khalil](https://appshunter.io/developer/1685448939) |

## What reviewers say

### Physical Constants

[App page](https://appshunter.io/ios/app/physical-constants-ml/id837679891)

Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.

**Highlights:** Physical constants database, Categorized by topic, Search functionality, Multi-language support, User feedback for corrections

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

**In-app purchases:** none


### Learn Quantum Physics Pro

[App page](https://appshunter.io/ios/app/learn-quantum-physics-pro/id6448938746)

Explore the fundamental principles of matter and energy at the most basic level. This comprehensive guide covers quantum mechanics, its applications, and the strange behavior of subatomic particles. Ideal for students and professionals seeking a deeper understanding of the universe's building blocks.

**Highlights:** Comprehensive quantum physics topics, Clear and easy-to-understand explanations, Covers fundamental interactions and particles, Explores applications of quantum theory, Details quantum mechanics and its interpretations, Includes wave-particle duality and entanglement

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

**In-app purchases:** none


## Frequently asked questions

### Is Physical Constants free?

Physical Constants is free to download, with no in-app purchases.

### Is Learn Quantum Physics Pro free?

Learn Quantum Physics Pro costs $1.99, with no in-app purchases.

### Which has better reviews, Physical Constants or Learn Quantum Physics Pro?

Learn Quantum Physics Pro is rated higher. Physical Constants averages 3.3 out of 5 from 3 ratings, while Learn Quantum Physics Pro averages 4.5 from 24 ratings.

### Do Physical Constants or Learn Quantum Physics Pro have ads?

Physical Constants shows ads; Learn Quantum Physics Pro does not.

### Which is updated more often, Physical Constants or Learn Quantum Physics Pro?

Physical Constants ships an update every 9 months, and Learn Quantum Physics Pro every 11 months. Most recently, Physical Constants was updated on October 14, 2026 and Learn Quantum Physics Pro on October 8, 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.*