AlgoVault is your all-in-one companion for mastering algorithms and data structures — whether you're preparing for technical interviews, brushing up on fundamentals, or building deep intuition through daily practice. Quiz & Practice Test yourself with a curated question bank covering 13 algorithm categories: Sorting, Searching, Dynamic Programming, Graph, Tree, Linked List, Stack & Queue, Greedy, Divide & Conquer, Backtracking, String, and Math. Choose Practice Mode for instant feedback after each question, or switch to Exam Mode to simulate real interview pressure. Algorithm Cheat Sheet A beautifully designed reference covering all major algorithms — time & space complexity tables, key points, use cases, and ready-to-copy code templates in Python. Perfect for quick review before an interview. Video Lessons Curated algorithm tutorial videos embedded directly in the app. Watch and learn without switching apps. Stats & Progress Track your accuracy, answer history, current streak, and performance broken down by category and difficulty. Visual charts help you spot weak areas at a glance. Favorites & Wrong Notebook Star questions you want to revisit. Wrong answers are automatically saved to your Wrong Notebook so you can focus your review where it matters most. Personal Notes Add notes to any question after reviewing the explanation. Your insights stay with each question for future reference. Dark Mode Full dark and light theme support, following your system preference or toggled manually. All data is stored locally on your device. No account required. No data uploaded to any server.