Coding Interview vs AlgoLens

Algo Mind turns abstract algorithms into something you can see. Every lesson pairs a step-by-step animated visualization with synced, highlighted code — you watch pointers move, trees grow, and tables fill in until the idea actually clicks. Stop memorizing solutions; learn the patterns behind them. WATCH ALGORITHMS THINK • 164 classic problems fully animated — play, pause, and step through at your own pace • Code highlighted in sync with the animation, line by line • A live memory view shows variables, pointers, and call frames as they change • Arrays, hash maps, linked lists, stacks, queues, binary trees, tries, heaps, graphs, matrices, DP tables, recursion stacks, sliding windows, and bit operations — one consistent visual language 1,576 PROBLEMS DEEP • The full interview canon, from Two Sum to hard dynamic programming • Solutions in four languages: Python, Java, Kotlin, and C++ • Plain-language explanations, worked examples, and time/space complexity for every problem • Filter by topic, difficulty, company, or your bookmarks — and track every solve A CLEAR PATH • Eight chapters from Foundations to interview-ready, picking up exactly where you left off • 21 animated cheatsheets with nearly 500 animated steps and predict-the-next-step quizzes — perfect for a fast review the night before an interview PRACTICE THAT STICKS • Quick 5, Daily Mix, weak-spot review, or build your own session by topic, difficulty, and company • Three question types: order the steps, true/false concept checks, and 176 fill-in-the-blank code puzzles • Timed Rank Mode for when you want a little pressure STAY ON TRACK • Daily streaks that count any learning activity • XP and per-topic progress tracking • Bookmarks and optional study reminders • Full dark mode • Core lessons work offline • No ads, ever START TODAY A selection of sample problems, puzzles, and cheatsheets is free. An optional Algo Mind Premium subscription unlocks the full library. Subscriptions renew automatically and can be managed in your App Store account settings. Privacy Policy: https://www.algomind.app/privacy.html Terms of Use: https://www.algomind.app/terms.html

AlgoLens teaches coding patterns the way they actually click — through real-world stories, interactive visualizers, and guided practice. Instead of memorizing abstract algorithms, see why and where each pattern is used in real software systems: • Fraud detection → Sliding Window • Duplicate payments → HashMap • Undo / Redo → Stack • Recently Played → Arrays • Friends of friends → Graph BFS • Calendar conflicts → Merge Intervals Eight pattern paths so far: • Arrays • HashMaps • Two Pointers • Sliding Window • Stack & Queue • Trees • Graph Basics • Merge Intervals Each lesson includes: • A real-world story that anchors the pattern in memory • An interactive visualizer — step through, play, watch the work happen • Guided practice problems with explanations • An interview-ready breakdown with time/space complexity, vs. brute force, and a Swift code sample in a syntax-highlighted editor Practice mode adds three coding game types: • Fill in the blanks — tap a token, drop it into the right slot • Sort the code — shuffled lines, tap two to swap them into order • Find the bug — read the function, tap the line that doesn't match the title Stack streaks, earn XP, and filter puzzles by the companies that ask similar questions in interviews — Google, Meta, Apple, Amazon, Microsoft. Built for mobile-first learning. iPhone-sized, dark code editor styling, short focused lessons designed for the in-between moments. Understand patterns visually. Remember them through stories. Apply them like real engineers.