Comparison

Electromag vs Physical Constants

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Basic equations memorandum
  • 20+ electromagnetism animations
  • 3D animations
  • Covers electrostatics, electric current, magnetism, and electromagnetism
  • Includes physical constants
  • Classroom projection support
Features
Read full description

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).

About

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.

Highlights
  • Physical constants database
  • Categorized by topic
  • Search functionality
  • Multi-language support
  • User feedback for corrections
Features
Read full description

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

Electromag4 screens
Physical Constants2 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
Electromag versus Physical Constants: the parameters behind the verdict, then further details
ParameterElectromagPhysical Constants
Price$1.99Free — better
Rating5.0 (2 ratings) — better3.3 (3 ratings)
Positive reviews45.5% of reviews — better33.3% of reviews
Number of ratings23 — better
Update frequencyEvery 9 monthsEvery 9 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.612.0 — better
Further details — not scored
Size20 MB25 MB
Age rating4+4+
DeveloperXavier DaxheletTakuya Ishikawa

Customer experience

Electromag

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive45.5%
Neutral27.3%
Negative27.3%

Physical Constants

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Electromag

No in-app purchases

None

Physical Constants

No in-app purchases

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.

Other comparisons