# E2M (Engineer with EM waves) vs Widgets Сlock

The clearest difference is update cadence: E2M (Engineer with EM waves) at fortnightly against Widgets Сlock's monthly. On price, ads, in-app purchases 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 and Widgets Сlock sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

E2M (Engineer with EM waves) ships an update fortnightly, Widgets Сlock monthly. The most recent releases landed on September 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | E2M (Engineer with EM waves) | Widgets Сlock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Freemium | — |
| Size | 80 MB | 46 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ComPhysics](https://appshunter.io/developer/1821978540) | [Artur Gareev](https://appshunter.io/developer/1772896198) |

## 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 |


### Widgets Сlock

[App page](https://appshunter.io/ios/app/widgets-lock-digital-analog/id6748155665)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Monthly Premium | $4.99 | per month |
| Weekly Premium | $5.99 | per 7 days |
| Weekly Premium | $5.99 | per 7 days |
| Yearly | $39.99 | per year |
| Lifetime | $29.99 | one-time |


## 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 Widgets Сlock free?

Widgets Сlock is free to download, with in-app purchases available.

### Do E2M (Engineer with EM waves) or Widgets Сlock have ads?

Neither E2M (Engineer with EM waves) nor Widgets Сlock shows ads.

### Which is updated more often, E2M (Engineer with EM waves) or Widgets Сlock?

E2M (Engineer with EM waves) ships an update fortnightly, and Widgets Сlock monthly. Most recently, E2M (Engineer with EM waves) was updated on September 19, 2026 and Widgets Сlock on September 17, 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.*