JavaScript Challenge
Feed your brain. Level up.
USD 2.99 · Designed for iPad. Not verified for macOS.
Feed your brain. Level up.
Learn to write real JavaScript by solving one puzzle at a time, right on your phone.
JavaScript Challenge is a single path of original coding problems, from your first function to graphs, dynamic programming and beyond. Every solution runs on-device in real JavaScript and is checked against hidden tests, so passing means it actually works.
One purchase, everything included: every challenge ships with the app. No subscription, no in-app purchases, no ads, no account.
WRITE REAL CODE
• A coder keyboard built for JavaScript: tab, brackets, quotes, snippets, undo
• Instant feedback with named tests, expected vs actual output
• Some levels enforce rules (no built-in array helpers, recursion required) so you learn the technique, not the shortcut
LEARN THE RIGHT WAY
• Three-tier hints from Rhino, your smug but surprisingly helpful mentor
• Curated solutions after you solve: naive vs optimal, time and space complexity
• Topics: strings, arrays, objects, closures, recursion, dynamic programming, sorting, searching, graphs, trees, hashing, bit tricks, grids, greedy strategies, intervals
STAY MOTIVATED
• One path, no shortcuts: easy → medium → hard, with performance tests on the hardest levels
• XP, player levels, daily streaks and badges
• Six themes, dark and light
PRIVATE BY DESIGN
• Works offline, no account — your code and progress stay on your device
• Only anonymous usage statistics, never your code; no tracking, no ads
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Performance and stability improvements; anonymous usage statistics help us improve the challenges.
The developer, MUSTAFA GURBUZ, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- MUSTAFA GURBUZ
- Size
- 13.4 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Mustafa Gürbüz
