Watch Bubble Sort, Quick Sort, and Binary Search algorithms come alive. Learn Data Structures & Algorithms through gamified lessons, step-by-step visualizers, and daily challenges.
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Greatester Catch transforms abstract algorithm concepts into animated visual experiences. The app renders sorting algorithms like Bubble Sort, Quick Sort, Merge Sort, and Heap Sort as vertical bars that swap positions in real-time. Each comparison operation is highlighted with distinct colors: pink for elements being compared, blue for pivot points in Quick Sort, and green for sorted sections.
The visualizer displays time complexity notation (O(n²), O(n log n), O(log n)) above each algorithm card and provides real-time status updates like "Comparing 64 and 22 → Swap!" beneath the animation. Users control execution with Play, Stop, and Reset buttons, allowing them to pause at any step to study the algorithm's decision-making process. The seven-bar array system uses varying heights to represent different numerical values being sorted.
Beyond sorting, the visualizer extends to searching algorithms including Binary Search, Linear Search, and Jump Search. For graph algorithms, it demonstrates BFS and DFS traversal patterns with connected node visualizations. Each algorithm runs at adjustable speeds, making it perfect for both quick demonstrations during study sessions and detailed analysis when preparing for technical interviews.
| Developer | Olena Shcheblykina |
| Category | Productivity |
| File Size | 5.9 MB |
| Platform | iPhone Only |
| iOS Requirement | 16.6 or later |
| Language | English |
| Age Rating | 4+ |
| Price | Free |
| In-App Purchases | None |
Master every fundamental: Variables, Control Flow, Functions, Arrays, Linked Lists, Stacks, Queues, Hash Tables, Binary Trees, Graphs. Each lesson includes complexity analysis, real-world applications, and difficulty ratings from Easy to Hard.
Watch Bubble Sort swap elements step-by-step, see Quick Sort's divide-and-conquer strategy unfold, understand Binary Search halving the search space. Color-coded bars and textual explanations accompany every operation.
Test knowledge with curated multiple-choice questions. Get immediate feedback with green checkmarks for correct answers and detailed explanations like "Binary search divides the search space in half each iteration."
Earn points for completed lessons and quizzes, maintain day streaks with flame indicators, unlock six achievements: First Steps, Bookworm, Quiz Master, On Fire, Century, and Champion. Start at Level 1 Student and climb the ranks.
Build consistency with Daily Challenges marked by flame badges, sharpen quick thinking in Speed Rounds, compete globally in Weekly Contests. Each activity contributes to your Total Points and quiz completion percentage.
Jump directly to Sorting Algorithms, Searching Techniques, Graph Theory, or Tree Structures from the home screen. Continue learning from your last position with progress indicators showing percentage completed per chapter.
Greatester Catch is designed specifically for computer science students, self-taught programmers, coding bootcamp participants, and anyone preparing for technical interviews. The app provides an optimized light mode interface with stunning gradient animations and intuitive navigation across five main sections: Home, Learn, Algo Visualizer, Practice, and Profile.