# JavaScript Manual vs ARMOR

The clearest difference is in-app purchases: JavaScript Manual at none against ARMOR's 3. JavaScript Manual also leads on iOS requirement (15.0 vs 18.0). ARMOR's advantage is update cadence (every 2 weeks vs every 31 months). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for JavaScript Manual against 5.0 for ARMOR. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

JavaScript Manual ships an update every 31 months, ARMOR every 2 weeks. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | JavaScript Manual | ARMOR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/javascript-manual/id6476828541/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/armor-urdf-and-robot-simulator/id6755694245/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 34 MB | 41 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hua Yang](https://appshunter.io/developer/1497666891) | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) |

## What reviewers say

### JavaScript Manual

[App page](https://appshunter.io/ios/app/javascript-manual/id6476828541)

An offline, ad-free guide to JavaScript, covering its core guide, built-in objects, and Web API. Access comprehensive documentation without an internet connection.

**Highlights:** JavaScript guide, Built-in objects, Web API documentation, Offline access, Ad-free experience

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

**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 desktop workflows. Ideal for engineers, students, and researchers on mobile devices.

**Highlights:** MuJoCo Physics Engine, Advanced URDF Viewer, Built-In Editor & Export, Humanoid & Spatial Robot Visualization, Robot Arm Kinematics, Augmented Reality (AR) 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 JavaScript Manual free?

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

### Is ARMOR free?

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

### Which has better reviews, JavaScript Manual or ARMOR?

JavaScript Manual and ARMOR are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do JavaScript Manual or ARMOR have ads?

Neither JavaScript Manual nor ARMOR shows ads.

### Which is updated more often, JavaScript Manual or ARMOR?

JavaScript Manual ships an update every 31 months, and ARMOR every 2 weeks. Most recently, JavaScript Manual was updated on November 8, 2026 and ARMOR on November 9, 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.*