LeetFlash vs LeetGrind

Mastering algorithms isn’t just about solving problems — it’s about reviewing them effectively! LeetFlash applies spaced repetition techniques, inspired by the Ebbinghaus forgetting curve, to help you deeply memorize and retain LeetCode problems, making your technical interview prep smarter and more efficient. Key Features: - Intelligent Review Scheduling: Automatically plan optimal review times based on your performance. - Easy Problem Capture: Use our Chrome Extension to save problems. - Cross-Device Sync: Keep your study progress in sync across mobile and desktop. Who is it for? - Students and professionals preparing for technical interviews - Developers aiming to strengthen their algorithm foundation - Learners looking to build a sustainable and effective study habit Let LeetFlash be your coach for algorithm mastery — turn your practice into lasting success! Note: Adding new problems is currently supported via the LeetFlash website. The iOS app focuses on reviewing your existing saved problems. Privacy Policy: https://www.leetflash.com/privacy Terms of Use: https://www.leetflash.com/terms

LeetGrind is the focused way to master the LeetCode and NeetCode 150, the essential set of data structures and algorithm problems every software engineer should know. FLASHCARDS & SOLUTIONS Every problem is a flashcard. Tap to flip between the problem statement and a detailed breakdown: approach, algorithm steps, time/space complexity, and full code solutions in Python and Java. QUIZ YOURSELF Each card includes a built-in quiz. Answer, get instant feedback showing the correct answer, and track your accuracy over time. Mark problems as Done or flag them for Review Later. SPACED REVIEW Build real retention. The app tracks which problems you've solved, which ones need review, and how many attempts each took. Come back to your flagged problems and keep drilling until they stick. STREAK TRACKING Stay consistent. The dashboard shows your current streak, best streak, daily activity heatmap, and progress ring, all at a glance. Set a daily goal and watch yourself improve. SMART REMINDERS Set notifications that remind you hourly, every 2–4 hours, or at custom times you pick. Choose which days of the week, and configure your own start/end hours. Never break your streak. ALL 150 PROBLEMS ORGANIZED Problems are grouped by category: Arrays & Hashing, Two Pointers, Sliding Window, Stack, Binary Search, Linked List, Trees, Tries, Heap / Priority Queue, Backtracking, Graphs, Dynamic Programming, Greedy, Intervals, Math & Geometry, and Bit Manipulation. PRIVACY FIRST All your data stays on your device. No accounts, no tracking, no analytics. Just you and the grind. ONE-TIME PURCHASE Unlock everything for $1.99. No subscriptions, no recurring charges, no ads. All future updates included. Problem data derived from the NeetCode 150 roadmap (MIT License, Copyright © 2022 neetcode-gh).