Codable: Code Challenges

Master Programming by Practice

Free · In‑App Purchases

Ten languages. Daily practice. Sharpen your skills in Swift, Python, Rust, Go, and more with hands-on challenges from fundamentals to concurrency. Codable turns programming practice into a habit. Solve focused challenges in ten languages — from your first data structure to lock-free concurrency — and build real fluency one problem at a time. WRITE REAL CODE IN 10 LANGUAGES C, C++, C#, Go, Java, JavaScript, Python, Rust, Swift, and TypeScript. Switch languages anytime — solve the same challenge in Python today and Rust tomorrow. GO DEEPER THAN SYNTAX Challenges span the topics that actually make you a better engineer: • Fundamentals and string manipulation • Data structures and algorithms • Recursion and functional programming • Object-oriented design and generics • Error handling, concurrency, and memory management BUILT FOR EVERY STAGE New to programming? Start with fundamentals and level up steadily. Experienced? Jump straight into concurrency, memory management, and the problems that show up in technical interviews. PRACTICE THAT STICKS Short, focused challenges designed to fit into a daily routine — because fluency comes from reps, not marathons. Download Codable and start mastering your chosen language!

Ratings & Reviews

  • 5.0
    out of 5
    3 Ratings

This update contains bug fixes and performance improvements.

Version 2026.5

The developer, Intrepid Reality, LLC, 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 Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Intrepid Reality, LLC
    Size
    • 3.2 MB
    Category
    • Developer Tools
    Compatibility
    Requires iOS 26 or later.
    • iPhone
      Requires iOS 26 or later.
    • iPad
      Requires iPadOS 26 or later.
    • Mac
      Requires macOS 26 or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Intrepid Reality, LLC
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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