Comparison

Gear Design vs Learn JavaScript | Learn JS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gear Design

Design involute gears with a CAD interface, allowing visual assessment through touch gestures. Generate and export STL data for 3D printing and perform tooth bending strength analysis with PDF sharing.

Highlights
  • Involute gear design
  • CAD interface
  • Touch gesture controls (zoom, rotate)
  • STL data generation
  • Email export
  • Tooth bending strength analysis
  • PDF sharing
Features
Read full description

Gear Design is great in designing involute gears from scratch. Application includes a CAD interface in front end where users can assess designed gears visually with their finger gestures (zoom, rotate, twist etc.). Users can easily generate STL data of the CAD model and export them via Email (Two step action: first generate data and then export via Email). Tooth bending strength analysis calculator is included with multiple sharing options, including a pdf file.

About

Learn JavaScript | Learn JS

Master JavaScript with comprehensive tutorials, an interactive code editor, and practical examples. Learn fundamentals to advanced concepts, track your progress, and practice coding offline. Ideal for beginners and professionals looking to enhance web development skills.

Highlights
  • Comprehensive JavaScript tutorials
  • Interactive code editor
  • Quizzes and coding challenges
  • Real-world practical examples
  • Offline access to materials
  • Learning progress tracker
  • Dark mode and customization
Features
Read full description

Learn JavaScript – Your Ultimate Guide to Web Development! Unlock the power of JavaScript, the world's most popular programming language, with our all-in-one learning app. Whether you're a beginner starting from scratch or a professional looking to enhance your skills, this app is designed to guide you through every aspect of JavaScript with ease and confidence. Why Learn JavaScript? JavaScript is the cornerstone of modern web development, enabling you to create dynamic and interactive websites, applications, and much more. By mastering JavaScript, you’ll open the door to exciting career opportunities in web development, game design, mobile app development, and even artificial intelligence! App Features Comprehensive Tutorials Learn step-by-step from JavaScript fundamentals to advanced concepts like ES6, asynchronous programming, and frameworks. Well-structured topics make it easy to follow and retain concepts. Interactive Code Editor Practice writing JavaScript code in real-time without needing external tools. Get instant feedback to understand and correct your mistakes. Quizzes and Challenges Test your knowledge with engaging quizzes and coding challenges. Track your progress and identify areas to improve. Practical Examples Explore real-world examples to understand how JavaScript is applied in projects. Learn concepts like DOM manipulation, event handling, APIs, and more. Dark Mode and Customization Study comfortably with a user-friendly dark mode interface. Customize font size and themes to suit your preferences. Offline Access Access learning materials and examples even when you're offline. Learning Progress Tracker Stay motivated by tracking your completed topics, quizzes, and achievements. Topics Covered Introduction to JavaScript: Understand the basics and importance of JavaScript. Variables and Data Types: Learn how to work with numbers, strings, arrays, and objects. Functions: Master function declarations, expressions, and arrow functions. DOM Manipulation: Control web page elements dynamically. Event Handling: Create interactive web pages with event listeners. ES6+ Features: Learn modern JavaScript features like let, const, template literals, destructuring, and more. Asynchronous JavaScript: Dive into promises, async/await, and AJAX. Object-Oriented Programming (OOP): Understand classes, inheritance, and prototypes. Error Handling: Write robust code by managing exceptions and errors. APIs and Fetch: Learn to interact with web services and retrieve data dynamically. Who Is This App For? Students: Get a head start in web development with interactive tutorials. Web Developers: Enhance your skills and stay updated with modern JavaScript. Coding Enthusiasts: Build your coding knowledge from the ground up. Why Choose Our App? Beginner-Friendly: Learn at your own pace with simplified explanations. Regular Updates: Stay ahead with the latest JavaScript features and practices. Community Support: Join a growing community of learners and developers. Learn Anytime, Anywhere With our Learn JavaScript app, you can explore programming concepts on the go. Study during commutes, at your favorite coffee shop, or while relaxing at home. All you need is a mobile device to start learning and coding. Boost Your Career JavaScript is not just a skill; it’s your gateway to high-paying jobs in web development, software engineering, and beyond. By mastering JavaScript, you’ll be equipped to work on diverse projects, including web applications, server-side programming, and more. Download Now Ready to embark on your JavaScript learning journey? Download our app today and take the first step towards becoming a skilled developer. Let’s code, create, and conquer the web together! Start learning JavaScript today and transform your future in tech!

Screenshots

Learn JavaScript | Learn JS4 screens

Verdict

The call

The clearest difference is review sentiment: Learn JavaScript | Learn JS at 100% against Gear Design's 0%. Learn JavaScript | Learn JS also leads on price (Free vs $2.99) and update cadence (weekly vs every 12 months). Gear Design's advantage is iOS requirement (9.3 vs 12.0). On ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Learn JavaScript | Learn JS is free to download; Gear Design costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Gear Design ships an update every 12 months, Learn JavaScript | Learn JS weekly. The most recent releases landed on September 22, 2026 and October 6, 2026 respectively.

Scorecard6 real differences · 4 level
Gear Design versus Learn JavaScript | Learn JS: the parameters behind the verdict, then further details
ParameterGear DesignLearn JavaScript | Learn JS
Price$2.99Free — better
Rating1.5 (2 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 12 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS9.3 — better12.0
Further details — not scored
Size38 MB56 MB
Age rating4+4+
DeveloperDRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STIAjit Jain

Customer experience

Gear Design

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Learn JavaScript | Learn JS

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Gear Design

No in-app purchases

None

Learn JavaScript | Learn JS

No in-app purchases

Questions

Is Gear Design free?
Gear Design costs $2.99, with no in-app purchases.
Is Learn JavaScript | Learn JS free?
Learn JavaScript | Learn JS is free to download, with no in-app purchases.
Do Gear Design or Learn JavaScript | Learn JS have ads?
Neither Gear Design nor Learn JavaScript | Learn JS shows ads.
Which is updated more often, Gear Design or Learn JavaScript | Learn JS?
Gear Design ships an update every 12 months, and Learn JavaScript | Learn JS weekly. Most recently, Gear Design was updated on September 22, 2026 and Learn JavaScript | Learn JS on October 6, 2026.

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