# Electromagnetic Forces vs Cal & Bomba

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.

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.

## The numbers

| Metric | Electromagnetic Forces | Cal & Bomba |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/electromagnetic-forces-emf/id1159691990/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 25 MB | 326 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Filiokus as](https://appshunter.io/developer/1693596934) |

## What reviewers say

### Electromagnetic Forces

[App page](https://appshunter.io/ios/app/electromagnetic-forces-emf/id1159691990)

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:** macOS Compatibility

**In-app purchases:** none


### Cal & Bomba

[App page](https://appshunter.io/ios/app/cal-and-bomba/id6450509459)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Version | $7.99 | one-time |


## Frequently asked questions

### Is Electromagnetic Forces free?

Electromagnetic Forces costs $0.99, with no in-app purchases.

### Is Cal & Bomba free?

Cal & Bomba is free to download, with in-app purchases available.

### Do Electromagnetic Forces or Cal & Bomba have ads?

Neither Electromagnetic Forces nor Cal & Bomba shows ads.

### Which is updated more often, Electromagnetic Forces or Cal & Bomba?

Electromagnetic Forces ships an update every 32 months, and Cal & Bomba every 3 months. Most recently, Electromagnetic Forces was updated on October 24, 2026 and Cal & Bomba on October 27, 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.*