# Physical Constants vs AngularQM

The clearest difference is price: Physical Constants at Free against AngularQM's $4.99. Physical Constants also leads on update cadence (every 9 months vs every 49 months) and ratings volume (3 vs 1). AngularQM's advantage is rating (5.0 vs 3.3) and ads (none vs shown). On in-app purchases and device support there is nothing between them.

Physical Constants is free to download; AngularQM costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AngularQM holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Physical Constants ships an update every 9 months, AngularQM every 49 months. The most recent releases landed on August 24, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Physical Constants | AngularQM |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/angularqm/id1319354337/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 months** | Every 49 months |
| Monetization | **Ad-supported** | Paid |
| Size | 25 MB | 5 MB |
| Requires iOS | **12.0** | 26.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [Gabriel Raffa](https://appshunter.io/developer/991109488) |

## 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


### AngularQM

[App page](https://appshunter.io/ios/app/angularqm/id1319354337)

This app helps quantum mechanics physicists quickly obtain matrix representations of angular momentum operators. It calculates matrices for J squared, the z component of J, and ladder operators for chosen total angular momentum values.

**Highlights:** Matrix representation of angular momentum operators, Calculates J squared matrices, Calculates Jz component matrices, Calculates ladder operator matrices (J+, J-), Supports various total angular momentum values (j), Visualizes matrix representations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Physical Constants free?

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

### Is AngularQM free?

AngularQM costs $4.99, with no in-app purchases.

### Which has better reviews, Physical Constants or AngularQM?

AngularQM is rated higher. Physical Constants averages 3.3 out of 5 from 3 ratings, while AngularQM averages 5.0 from 1 ratings.

### Do Physical Constants or AngularQM have ads?

Physical Constants shows ads; AngularQM does not.

### Which is updated more often, Physical Constants or AngularQM?

Physical Constants ships an update every 9 months, and AngularQM every 49 months. Most recently, Physical Constants was updated on August 24, 2026 and AngularQM on July 4, 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.*