# E vs ARMOR

The clearest difference is in-app purchases: E at none against ARMOR's 3. E also leads on iOS requirement (15.0 vs 18.0). ARMOR's advantage is update cadence (every 2 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. ARMOR sells 3 in-app purchases, starting at $4.99 per month. E asks for nothing beyond the download.

E ships an update every 4 months, ARMOR every 2 weeks. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | E | ARMOR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/armor-urdf-and-robot-simulator/id6755694245/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 110 MB | 36 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Convenio AB](https://appshunter.io/developer/977691081) | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-grc/id1498410151)

**Features:** macOS Compatibility

**In-app purchases:** none


### ARMOR

[App page](https://appshunter.io/ios/app/armor-urdf-and-robot-simulator/id6755694245)

Simulate robot dynamics with a powerful physics engine and visualize them in augmented reality. Load and inspect URDF robot files, edit them, and export for further development. Ideal for engineers, students, and researchers working with robotics.

**Highlights:** MuJoCo physics engine, Advanced URDF viewer, Built-in editor and export, Humanoid and spatial robot visualization, Robot arm kinematics, Augmented Reality (AR) integration, ROS workflow integration

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $49.99 | per year |
| Premium Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is E free?

E is free to download, with no in-app purchases.

### Is ARMOR free?

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

### Do E or ARMOR have ads?

Neither E nor ARMOR shows ads.

### Which is updated more often, E or ARMOR?

E ships an update every 4 months, and ARMOR every 2 weeks. Most recently, E was updated on October 17, 2026 and ARMOR on October 11, 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.*