Car Mid vs E2M (Engineer with EM waves)
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Car Mid
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Bluetooth Upgrade Car Mid Product
E2M (Engineer with EM waves)
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.
- 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)
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Engineer with EM waves (E2M) is a powerful and fast 1D electromagnetic solver designed for engineers, researchers, and students. Analyze complex layered structures, extract photonic bands, and simulate optical properties directly on your iOS device. Key Features: - Advanced 1D EM Solver: Simulate 1D stacked (layered) structures with high-speed performance. - Comprehensive Analysis: Calculate Reflectance, Transmittance, and Absorptance (RTA) as functions of incident angle, thickness, and frequency. - Polarization Control: Analyze arbitrary polarization states. Define complex TE and TM inputs to simulate Linear, Circular, or Elliptical polarization interactions. - Photonic Band Structures: Extract band structures for both TE and TM modes to analyze periodic systems. - Material Library: 1. Built-in integration with the refractiveindex.info database for immediate access to practical material parameters (converts complex refractive index to complex permittivity/permeability assuming non-magnetic media). 2. User-Defined Materials: Create custom materials, including general LHI (Linear, Homogeneous, Isotropic) and Metamaterials (Double Negative/DNG). - Flexible Domain Settings: Switch simulation parameters between Frequency (THz), Wavelength (ฮผm), or Energy (eV). - Data Export: Easily export raw data (.csv) and figures via Email or the iOS Files app for post-processing. Freeware Mode: E2M offers a generous free mode allowing designs of up to 3 layers. It supports infinite periodic repetition of these layers, enabling a wide range of academic calculations and case studies without a subscription. In-App Subscriptions: Unlock the full potential of E2M to design structures with unlimited layers. - Options: One Month, One Year, Lifetime. - Benefit: Removes the 3-layer limitation during the subscription period. - Terms: Subscriptions (excluding Lifetime) automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple Account settings. Legal - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://comphysics.com/index.php/privacy-policy-2/
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Verdict
The clearest difference is in-app purchases: Car Mid at none against E2M (Engineer with EM waves)'s 3. Car Mid also leads on iOS requirement (12 vs 17.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. E2M (Engineer with EM waves) sells 3 in-app purchases, starting at $7.99 per month. Car Mid asks for nothing beyond the download.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.
| Parameter | Car Mid | E2M (Engineer with EM waves) |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 100.0% of reviews |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Monetization | โ | Freemium |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 12 โ better | 17.6 |
| Further details โ not scored | ||
| Size | 19 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Huizhou Dongrong Haotian Electronic Technology Co., Ltd. | ComPhysics |
In-app purchases
Car Mid
No in-app purchases
E2M (Engineer with EM waves)
- Standard: 1 month subscription7 Days trial$7.991 Month
- Standard: 1 year subscription7 Days trial$79.991 Year
- E2M Lifetime License$239.99
Questions
Is Car Mid free?
Is E2M (Engineer with EM waves) free?
Do Car Mid or E2M (Engineer with EM waves) have ads?
Which is updated more often, Car Mid or E2M (Engineer with EM waves)?
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