AlgoScroll

AlgoScroll is the fastest way to prepare for coding and system design interviews. Swipe right when you know it. Swipe left to skip. Work through 1500+ hand-curated questions — one card at a time. TWO DECKS, ONE APP • 1000+ Data Structures & Algorithms questions across 14 topics • 500+ System Design questions covering real-world architecture • Switch between DSA and Design with a single tap LEARN SMARTER • Animated step-by-step walkthroughs synced with code • Spaced repetition resurfaces cards at the optimal moment • Smart ranking adapts difficulty to your pace — no more 3 Hard questions in a row DAILY PRACTICE • Daily goal + streak tracking to build a consistent habit • Timed daily challenges (6 questions, beat the clock) • Focus mode targets your weakest topics automatically STAY ORGANISED • Bookmark questions to revisit later • Filter by topic, difficulty, status, or time complexity • Library with Known, Skipped, and Saved tabs • Search any question by title, topic, or ID SYSTEM DESIGN TOPICS Bloom Filters, Consistent Hashing, Rate Limiters, Message Queues, CAP Theorem, Kafka, Raft Consensus, CDNs, Database Sharding, Circuit Breakers, CRDTs, Leader Election, and 500+ more. DSA TOPICS Arrays, Trees, Graphs, DP, Binary Search, Sliding Window, Backtracking, Heaps, Stacks, Queues, Linked Lists, Strings, Bit Manipulation, Math. GO PRO • Unlock all 1500+ questions (free: 50 DSA + 15 Design) • Full animated examples on every question • Spaced repetition scheduling • Deep analytics by topic and difficulty • Search across the entire question bank Built for engineers preparing for FAANG, startups, and campus interviews. No fluff. No ads. Just focused practice.