Comparison

PP+ Ohm's Law vs Electromagnetic Forces

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

Head to head
About

PP+ Ohm's Law

Features
Read full description

The Ohm’s Law lab uses a resistor, a power supply, a voltmeter, and an ammeter to investigate the relationships between the voltage, current, and resistance in a circuit. It is part of Polyhedron Physics Plus, a set of 24 iPad apps for use in the classroom. To see how they work, try the FREE PP+ Newton’s 2nd Law lab. For those who’d prefer to develop their own experiments, the PP Ohm’s Law Apparatus app features a similar apparatus without lab procedures and other supporting materials. In addition to a 3D simulation that produces realistic data, each lab includes introductory videos, background theory, experimental procedure, analysis and reporting tools, pre-lab quiz, post-lab questions, and teacher support materials. The experimental data produced by the simulations are realistic, including random and systematic errors. These features allow students to use standard data analysis and error analysis techniques to report on their own unique data, just as if the experiment had been performed using hands-on equipment. These labs can serve as replacements for hands-on labs, especially when equipment is not available, or as supplements to hands-on labs. They are also a suitable option for students in distance learning and home school situations. Formative and summative evaluations showed no significant difference in learning between students using the virtual labs and those using hands-on labs. Preliminary results suggest increased learning by students using the virtual labs as supplements to hands-on. Polyhedron Physics was developed by Polyhedron Learning Media, Inc. with partial funding provided under contract numbers ED-07-CO-0040 and ED-IES-11-C-0029 from the Institute of Education Sciences in the U.S. Department of Education through the Small Business Innovation Research (SBIR) program.

About

Electromagnetic Forces

This educational app uses interactive 3D animations and experiments to explain electromagnetism and cathode rays for K12 students. It covers Fleming's left-hand rule, cathode ray structure, and the Cathode Ray Oscilloscope, with practice exercises and quizzes to reinforce learning.

Highlights
  • Interactive 3D animations
  • Explains Fleming's left-hand rule
  • Demonstrates cathode ray structure
  • Illustrates Cathode Ray Oscilloscope
  • Practice exercises
  • Interactive quizzes
Features
Read full description

Electromagnetic Forces physics app has been designed for K12 students to describe the process of magnetic effect and magnetic force of current. This app helps students to learn about Fleming’s left-hand rule and describes cathode rays structure in an interactive way. In addition, the electromagnetic Forces app illustrates the uses of Cathode Ray Oscilloscope through 3D animations. Each section is explained in detail with diagrams, graphical representations and animations along with simple text explaining the concept. Features of Electromagnetic Forces App: Learn -This section describes the overall process of Electromagnet and Cathode Ray Oscilloscope with 3D animations. Electromagnet - An electromagnet experiment using a wire & Fleming’s left-hand rule to check magnetic effect and magnetic force of current with interactive 3D animations. Cathode rays - In this, cathode rays experimented through CRO (cathode ray oscilloscope) using electromagnetic forces process in an interactive way. 2) Practice - This section helps to practice the working process of electric motor and also observe the variations in sine wave graph with animated 3D experiments. 3) Quiz - Evaluate the knowledge gained from Electromagnetic Forces application through an interactive quiz with scoreboard. This educational application helps students to understand electromagnet and cathode rays in an easy and quick method through interactive animations and experiments. Download the Electromagnetic Forces app and other K12 education apps published by Ajax Media Tech Pvt Ltd to learn physics in an easy and interactive way. Unlike a static or video based education model, which is non-interactive, K12 simulator apps are fully interactive and developed based on adaptive learning.

Screenshots

Electromagnetic Forces4 screens

Verdict

The call

The clearest difference is device support: Electromagnetic Forces at 3 against PP+ Ohm's Law's 1. Electromagnetic Forces also leads on price ($0.99 vs $1.99) and iOS requirement (12.0 vs 18.0). On update cadence, ads and in-app purchases 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

PP+ Ohm's Law costs $1.99 and Electromagnetic Forces $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PP+ Ohm's Law ships an update every 29 months, Electromagnetic Forces every 32 months. Both last shipped on September 18, 2026.

Scorecard3 real differences · 7 level
PP+ Ohm's Law versus Electromagnetic Forces: the parameters behind the verdict, then further details
ParameterPP+ Ohm's LawElectromagnetic Forces
Price$1.99$0.99 — better
Rating—1.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 29 months — betterEvery 32 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS18.012.0 — better
Further details — not scored
Size100 MB25 MB
Age rating4+4+
DeveloperPolyhedron Learning Media, Inc.www.ajaxmediatech.com

In-app purchases

None

PP+ Ohm's Law

No in-app purchases

None

Electromagnetic Forces

No in-app purchases

Questions

Is PP+ Ohm's Law free?
PP+ Ohm's Law costs $1.99, with no in-app purchases.
Is Electromagnetic Forces free?
Electromagnetic Forces costs $0.99, with no in-app purchases.
Do PP+ Ohm's Law or Electromagnetic Forces have ads?
Neither PP+ Ohm's Law nor Electromagnetic Forces shows ads.
Which is updated more often, PP+ Ohm's Law or Electromagnetic Forces?
PP+ Ohm's Law ships an update every 29 months, and Electromagnetic Forces every 32 months. Most recently, PP+ Ohm's Law was updated on September 18, 2026 and Electromagnetic Forces on September 18, 2026.

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