Electromagnetic Forces vs Cal & Bomba
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Interactive 3D animations
- Explains Fleming's left-hand rule
- Demonstrates cathode ray structure
- Illustrates Cathode Ray Oscilloscope
- Practice exercises
- Interactive quizzes
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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.
Cal & Bomba
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Join the pyromaniac gnome Cal and the troll Bomba on an explosive math adventure, in this award winning game. They travel through different worlds with their cannon. You must use percentage calculations to change the range of the cannon. Cal & Bomba are designed by the Norwegian game development company Filiokus, and the goal is for you to experience how mathematical choices have practical consequences, and hopefully for you to have some fun while doing math. Mathematics in the game The game introduces the player to two important mathematical aspects: strategy - what should I do and why? And calculation - how should I apply mathematical theory to execute the desired strategy? The strategy part of the game has many parallels to chess. You will encounter challenges where you need to foresee 1-2 moves ahead and make strategic choices that enhance the effectiveness of your bombs. The calculation part of the game aims to provide insight into how percentage calculations work. If the cannon's range is 4 and you want to shoot something that is at 6, you need to figure out by how much 4 must increase in percentage for the result to be 6. (In this example, we would recommend increasing the range by 50%). Visual mathematics When you increase or decrease the range through percentage calculations, it will result in a change both in the number representing the range and in the visual range indicator. We believe that when mathematical theory gains a visual dimension to express itself, it becomes easier to understand the meanings of different numbers and functions, and over time, users develop pattern recognition skills that can be transferred to regular math education. Learn from your mistakes Making mistakes is an important part of the learning process. If you make mistakes in the game, you will have the opportunity to experience the consequences of those mistakes. The game will play out your mathematical choices, whether they are good or bad, and you decide if you are satisfied with the outcome. We strongly believe that mathematical logic becomes easier to understand when you are allowed to play with it and experience the consequences of the choices you make. Mathematics is a problem-solving tool In reality, people rarely use mathematics just for the sake of it. Math is used as a tool to solve a problem. However, in regular math education, it is often the case that mathematics itself is the only application of mathematics, and many find it difficult to see why they will need this knowledge later on. In Cal & Bomba, you don't calculate for the sake of calculating. Your goal is to shoot all the enemies on the board. Percentage calculation is a tool you need to use to achieve this goal, and it must be combined with other game mechanics to achieve the desired result. Happy hunting.
Screenshots
Verdict
The clearest difference is price: Cal & Bomba at Free against Electromagnetic Forces's $0.99. Cal & Bomba also leads on update cadence (every 3 months vs every 32 months). Electromagnetic Forces's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
Cal & Bomba is free to download; Electromagnetic Forces costs $0.99 up front. Cal & Bomba sells 1 one-off in-app purchase. Electromagnetic Forces asks for nothing beyond the download.
Electromagnetic Forces ships an update every 32 months, Cal & Bomba every 3 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Electromagnetic Forces | Cal & Bomba |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 32 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 25 MB | 326 MB |
| Age rating | 4+ | 9+ |
| Developer | www.ajaxmediatech.com | Filiokus as |
In-app purchases
Electromagnetic Forces
No in-app purchases
Cal & Bomba
- Unlock Full Version$7.99
Questions
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Is Cal & Bomba free?
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