Electromag vs Physical Constants
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electromag
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.
- Basic equations memorandum
- 20+ electromagnetism animations
- 3D animations
- Covers electrostatics, electric current, magnetism, and electromagnetism
- Includes physical constants
- Classroom projection support
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Electromag is an educative application in support to a high-school or university course of electromagnetism. It contains not only a memorandum of the basic equations, but it also contains approximately twenty animations illustrating the various concepts of electromagnetism. This application runs also on iPad and iPod Touch 3rd generation and later. 50 screens of electromagnetism! For teachers !! Connect your iPad with a video projector and show the animations to your students in classroom. List of covered subjects: Electrostatics: Coulomb'sLaw, Electric Field, Gauss Theorem, Electric Potential, Capacitance. Electric Current: Current and Resistance, Circuits. Magnetism: Magnetic Field, Magnetic Fields Due to Currents, Electromagnetic Induction, Inductance. Electromagnetism: Maxwell Equations, Wave Equation. Physical Constants. Each section contains at least one animation of which some in 3D. List of animations: - Coulomb's law, - Electric field lines, - Movement of a charge in electric field, - Electric dipole, - Lead-acid battery, - Torque on a current loop (in 3D), - Charge in magnetic field, - Cyclotron, - Induction field due to a current in a long straight wire (in 3D), - Generator (in 3D).
Physical Constants
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.
- Physical constants database
- Categorized by topic
- Search functionality
- Multi-language support
- User feedback for corrections
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Application that displays the physical constants. Classified by category, easy to search. Supports all languages in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Electromag | Physical Constants |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 3.3 (3 ratings) |
| Positive reviews | 45.5% of reviews — better | 33.3% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 9 months | Every 9 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Xavier Daxhelet | Takuya Ishikawa |
Customer experience
Electromag
Physical Constants
In-app purchases
Electromag
No in-app purchases
Physical Constants
No in-app purchases
Questions
Is Electromag free?
Is Physical Constants free?
Which has better reviews, Electromag or Physical Constants?
Do Electromag or Physical Constants have ads?
Which is updated more often, Electromag or Physical Constants?
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