RubySpark: Learn Ruby Offline

Master Ruby from scratch with a beautifully designed offline handbook.
No internet required. No subscriptions. Just pure, focused learning —
whenever and wherever you want.

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📚 45 STRUCTURED LESSONS
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From Ruby basics to advanced object-oriented programming. Every lesson
includes a clear explanation, syntax-highlighted code examples, a mock
code sandbox, and an interactive quiz to test your understanding.

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⚡ WORKS 100% OFFLINE
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All 45 lessons, quizzes, and code examples are bundled directly in the
app. Open RubySpark on a plane, in a café, or anywhere with zero signal
— it all works perfectly.

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🎨 FULLY CUSTOMISABLE
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• Choose your accent color: Ruby Red, Emerald, Indigo, or Amber
• Adjust theory font size: Small, Medium, or Large
• Switch between Dark and Light themes at any time

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🔍 SMART SEARCH & FILTER
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Instantly search all 45 lessons by title, topic, or module. Filter by
difficulty — Beginner, Intermediate, Advanced, or Expert — to jump
straight to what you need.

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💡 INTERACTIVE CODE SANDBOX
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Every lesson has a syntax-highlighted Ruby example. Tap Run to see the
expected output directly inside the app, making it easy to follow along
and understand each concept in practice.

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🧠 QUIZ AFTER EVERY LESSON
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Reinforce what you have learned with a focused quiz at the end of each
lesson. Get instant feedback with clear explanations for every answer.

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🌙 BEAUTIFUL DARK & LIGHT THEMES
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Designed for long reading sessions. The deep dark theme reduces eye
strain, while the clean light theme is perfect for daytime use.
Switch any time in Settings.