📘 All 72 lessons rewritten: clear steps, code examples with output & quick quizzes 🔤 Tap a highlighted word to see its meaning 🔠 Adjust lesson text size with the Aa button ✅ Mark chapters as done and track your progress 🎯 Home shows your daily goal, streak & where you left off 🏅 Pro badge + shareable completion certificates 🧩 Free problems now listed first 📱 Discover our other learning apps