JavaScript Manual vs ARMOR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JavaScript Manual
An offline, ad-free guide to JavaScript, covering its core guide, built-in objects, and Web API. Access comprehensive documentation without an internet connection.
- JavaScript guide
- Built-in objects
- Web API documentation
- Offline access
- Ad-free experience
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JavaScript Manual - Complete Offline Reference Your go-to companion for JavaScript development. Read everything from ES6+ basics to Web APIs anytime, anywhere - fully offline. Three core modules: - JavaScript Guide: variables, functions, closures, async/await, prototypes and modern ES6+ syntax - Built-in Objects: Array, Object, String, Number, Date, RegExp, Map, Set, Promise and more, with methods and examples - Web API: DOM, Fetch, Storage, Canvas, WebSocket and browser interfaces Why developers love it: - 100% offline - all content stored on your device - Zero ads - clean, distraction-free reading - Lightweight and fast - built for quick lookups Perfect for learning, coding reference, interview prep, and offline study. Questions or feedback? Contact: devspera@outlook.com
ARMOR
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.
- MuJoCo Physics Engine
- Advanced URDF Viewer
- Built-In Editor & Export
- Humanoid & Spatial Robot Visualization
- Robot Arm Kinematics
- Augmented Reality (AR) Integration
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ARMOR brings real MuJoCo physics simulation to your pocket. Load any URDF (Unified Robot Description Format) robot, simulate true dynamics, and place it in AR — directly on iPhone, iPad, and Mac. Built for robotics engineers, students, and researchers, ARMOR bridges the gap between desktop-grade simulation and mobile accessibility — inspect joint kinematics, fine-tune a humanoid's balance, or demo a collaborative robot arm, all without a workstation. KEY FEATURES: • MuJoCo Physics Engine: Leverage the industry-standard MuJoCo engine for high-fidelity physics simulations. ARMOR makes it easy to visualize joint dynamics and collisions on mobile hardware. • Advanced URDF Viewer: Load and inspect your own URDF robot files—the standard XML format produced by ROS and XACRO workflows. ARMOR handles complex links, joints, and geometries with ease, providing a comprehensive engineering view of your robot's structure. • Built-In Editor & Export: Create and edit links and joints with guided wizards, then export your project as a ROS-style URDF package or a MuJoCo MJCF file to continue your work on the desktop. • Humanoid & Spatial Robot Visualization: Perfect for visualizing cutting-edge platforms. Load models similar to the Boston Dynamics Atlas or open-source humanoids like the Reachy Mini to study their form and motion in a spatial context. • Robot Arm Kinematics: A vital tool for industrial automation and cobot development. Inspect robot arms like the ABB YuMi and other multi-axis systems with precision. • Augmented Reality (AR): Move from the screen to the real world. Place your robot models in your physical environment at 1:1 scale to assess spatial dimensions and workplace layout. • Engineering Workflow Integration: Designed for the modern robotics professional. ARMOR supports standard file formats, making it the perfect companion for ROS (Robot Operating System) workflows. WHY ARMOR? ARMOR was built by engineers, for engineers. By bridging the gap between desktop simulation and mobile accessibility, ARMOR allows you to present your robotics projects to clients, teach engineering concepts in the classroom, or debug kinematics during a field test—all from your mobile device. COMPATIBILITY: ARMOR supports a wide range of URDF configurations, including those used for humanoid robots, industrial grippers, and mobile platforms. Optimized for the latest iOS hardware to ensure smooth, fluid rendering even for complex assemblies. Disclaimer: ARMOR is an independent third-party application and is not affiliated with, sponsored by, or endorsed by Boston Dynamics, ABB, or the MuJoCo project. References to third-party trademarks and robot models are for nominative and descriptive purposes only, to indicate compatibility and visualization capabilities. All other trademarks are the property of their respective owners. Terms and Conditions: https://armor.dc-engineer.com/terms.html
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | JavaScript Manual | ARMOR |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Every 31 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 34 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Hua Yang | Eliott Radcliffe |
Customer experience
JavaScript Manual
ARMOR
In-app purchases
JavaScript Manual
No in-app purchases
ARMOR
- Premium Monthly$4.991 Month
- Premium Yearly$49.991 Year
- Premium Lifetime$99.99









