# Electromag vs Physical Constants

The clearest difference is price: Physical Constants at Free against Electromag's $1.99. Physical Constants also leads on iOS requirement (12.0 vs 18.6). Electromag's advantage is rating (5.0 vs 3.3) and ads (none vs shown). On ratings volume, update cadence, in-app purchases and device support there is nothing between them.

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

Electromag holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 45% of Electromag's written reviews are positive against 33% of Physical Constants's.

Both ship on a similar rhythm, roughly every 9 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Electromag | Physical Constants |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/electromag/id404649255/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | **45.5% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | Every 9 months |
| Monetization | Paid | **Ad-supported** |
| Size | 20 MB | 25 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xavier Daxhelet](https://appshunter.io/developer/339056993) | [Takuya Ishikawa](https://appshunter.io/developer/468311118) |

## What reviewers say

### Electromag

[App page](https://appshunter.io/ios/app/electromag/id404649255)

Explore fundamental concepts of electromagnetism through interactive animations and detailed explanations. This app supports high school and university courses, covering electrostatics, electric current, magnetism, and Maxwell's equations with visual aids.

**Highlights:** Basic equations memorandum, 20+ electromagnetism animations, 3D animations, Covers electrostatics, electric current, magnetism, and electromagnetism, Includes physical constants, Classroom projection support

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Electromag free?

Electromag costs $1.99, with no in-app purchases.

### Is Physical Constants free?

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

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

Electromag is rated higher. Electromag averages 5.0 out of 5 from 2 ratings, while Physical Constants averages 3.3 from 3 ratings.

### Do Electromag or Physical Constants have ads?

Physical Constants shows ads; Electromag does not.

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

Electromag ships an update every 9 months, and Physical Constants every 9 months. Most recently, Electromag was updated on September 29, 2026 and Physical Constants on October 2, 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.*