# E2M (Engineer with EM waves) vs BMC File Converter

The clearest difference is in-app purchases: BMC File Converter at none against E2M (Engineer with EM waves)'s 3. BMC File Converter also leads on iOS requirement (15.1 vs 17.6). E2M (Engineer with EM waves)'s advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. E2M (Engineer with EM waves) sells 3 in-app purchases, starting at $7.99 per month. BMC File Converter asks for nothing beyond the download.

## The numbers

| Metric | E2M (Engineer with EM waves) | BMC File Converter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | — |
| Monetization | Freemium | — |
| Size | 80 MB | 35 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ComPhysics](https://appshunter.io/developer/1821978540) | [Abderrahmen Ben Mariem](https://appshunter.io/developer/1764553590) |

## What reviewers say

### E2M (Engineer with EM waves)

[App page](https://appshunter.io/ios/app/e2m-engineer-with-em-waves/id6747601796)

This app is a 1D electromagnetic and optics simulator for iOS devices. It allows engineers, researchers, and students to analyze layered structures, extract photonic bands, and simulate optical properties with advanced polarization control and material libraries.

**Highlights:** 1D EM solver for layered structures, Reflectance, Transmittance, Absorptance analysis, Arbitrary polarization state analysis, Photonic band structure extraction, Integrated material library (refractiveindex.info), User-defined materials, Data export (.csv, figures)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard: 1 month subscription | $7.99 | per month |
| Standard: 1 year subscription | $79.99 | per year |
| E2M Lifetime License | $239.99 | one-time |


### BMC File Converter

[App page](https://appshunter.io/ios/app/bmc-file-converter/id6761391070)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is E2M (Engineer with EM waves) free?

E2M (Engineer with EM waves) is free to download, with in-app purchases available.

### Is BMC File Converter free?

BMC File Converter is free to download, with no in-app purchases.

### Do E2M (Engineer with EM waves) or BMC File Converter have ads?

BMC File Converter shows ads; E2M (Engineer with EM waves) does not.

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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.*