Learn Coding vs AlgoCode Learn

Land your next tech job. Off By One turns learning to code and coding interview prep into a five-minute daily habit. Real interview problems, taught the way you actually learn: step by step, with animated visualizations, guided code building, and complexity quizzes. You watch the algorithm move, then you build it yourself, then you prove you understand why it works. No copy-pasting into a judge, no walls of text. WHAT'S INSIDE • 64 guided lessons across 14 topics: arrays and hashing, two pointers, sliding window, stacks, binary search, linked lists, trees, tries, heaps, backtracking, graphs, dynamic programming, greedy algorithms, and intervals • Every lesson in Python, Java, and JavaScript, each written for that language by hand, never transliterated: the JavaScript version asks JavaScript questions, the Java version asks Java questions • Animated, step-by-step visualizations that show how each algorithm actually works: pointers travel, windows slide, trees traverse • Big-O time and space quizzes on every problem, so you can explain the "why" in the room, not just recite the code • 20 system design stories covering caching, load balancing, sharding, CDNs, rate limiting, database indexing, message queues, CAP, WebSockets, and more • A beginner intro for every topic, so you can start from zero and still end up interview-ready • Streaks, weekly progress charts, and an activity grid that keep you honest, five minutes at a time HOW A LESSON WORKS 1. Understand the problem and the approach in plain language 2. Watch the algorithm run, one step at a time 3. Build the solution yourself with guided code steps 4. Answer for its time complexity 5. Answer for its space complexity Finish a lesson and the next one is waiting: the curriculum is ordered so every topic builds on the one before it. WHO IT'S FOR • Complete beginners who want to learn to code with a clear goal • CS students preparing for internship and new-grad interviews • Self-taught developers filling the data structures and algorithms gap • Working engineers brushing up before the next interview loop START FREE Every lesson and story opens free: read the problem, watch the first steps, get a feel for it. Premium unlocks full visualizations, code building, complexity training, and system design. Off By One Premium is an auto-renewing subscription. Plans: annual with a 3-day free trial, monthly with a 3-day free trial, or weekly. Prices are shown in the app in your local currency. Payment is charged to your Apple ID account at purchase confirmation, or when the free trial ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. Unused trial time is forfeited on purchase. Privacy Policy: https://www.ijustwantagoodjob.com/off-by-one/privacy-policy Terms of Use: https://www.ijustwantagoodjob.com/off-by-one/terms-of-service

Ace Your Technical Interviews & Coding Rounds. Anywhere. Offline. Preparing for campus placements or technical interviews? AlgoCode Learn is your pocket companion for mastering Data Structures and Algorithms (DSA). Whether you are targeting FAANG or preparing for mass recruiter coding rounds, we help you build intuition fast. Why 50,000+ Developers Trust Us: 1. Localized for Learning Now fully available in English, Hindi (हिंदी), and Russian. Learn complex logic in the language you think in. Perfect for students preparing for Indian IT placements. 2. The "Algorithm Speed Run" Game Cracking the coding interview isn't just about code—it's about speed. Test your knowledge of Time Complexity (Big O) in our 30-second rapid-fire mode. Perfect for preparing for MCQ rounds in competitive exams. Gamified stats to track your streaks. 3. 100% Offline Mode No internet? No problem. Access hundreds of solutions (Python, Java, C++) without using your data plan. Study logic flows on the bus, train, or subway. Zero lag, instant loading. 4. Visual & Interactive Stop memorizing code. Understand the pattern. Step-by-step visualizations for Linked Lists, Trees, and Graphs. "Whiteboard style" explanations that break down the why, not just the how. Covered Topics: Arrays, Linked Lists, Sliding Window Trees (Binary, BST, AVL), Graphs (BFS, DFS) Dynamic Programming (DP), Recursion System Design Basics Download AlgoCode Learn now and turn your commute into a study session.