SmartGrind is a free web application for mastering coding interview patterns through spaced repetition. It helps you practice LeetCode problems efficiently, track your progress, and improve algorithmic skills with AI-assisted learning.

Is SmartGrind free to use?

Yes, SmartGrind is completely free to use. You can practice all coding patterns, algorithms, and SQL problems without any cost. We also offer optional Google account sync to track progress across devices.

Does SmartGrind have SQL practice problems?

Yes! SmartGrind includes 14 SQL categories covering everything from basic SELECT statements to advanced window functions, CTEs, joins, subqueries, aggregations, and performance optimization techniques.

How does the spaced repetition system work?

SmartGrind uses a scientifically-proven spaced repetition algorithm that schedules problem reviews at optimal intervals (1, 3, 7, 14, 30, and 60 days) to maximize long-term retention. The system reminds you to review problems just before you are likely to forget them.

Can I track my progress across multiple devices?

Yes, SmartGrind supports progress synchronization across all your devices. Simply sign in with your Google account and your solved problems, notes, and review schedules will be automatically synced.

Does SmartGrind work offline?

Yes, SmartGrind is a Progressive Web App (PWA) that works offline. Once installed, you can access all pattern explanations, algorithm tutorials, and SQL content without an internet connection. Your progress syncs when you reconnect.

Is there a Chrome extension available?

Yes, SmartGrind offers a Chrome extension that enhances your LeetCode experience with numerical difficulty ratings (0-3000 scale), smart problem picking with filters, and quick access to pattern information while solving problems on LeetCode.

What programming languages are supported in the code examples?

SmartGrind provides code examples in Python, C++, Java, and JavaScript for every algorithm and pattern. Each solution includes multiple approaches with time and space complexity analysis.

How many LeetCode problems are covered?

SmartGrind covers 500+ LeetCode problems across all difficulty levels (Easy, Medium, Hard), each categorized by pattern and algorithm type to help you practice efficiently.

SmartGrind

Master Coding Patterns with Spaced Repetition

⚠️ JavaScript Required

SmartGrind is an interactive web application that requires JavaScript to function. Please enable JavaScript in your browser settings to access all features.

What is SmartGrind?

SmartGrind is a powerful tool for mastering coding interview patterns through spaced repetition. Practice LeetCode problems efficiently, track your progress, and improve your algorithmic skills with AI-assisted learning.

✓ 15+ Pattern Categories - Two Pointers, Sliding Window, DP, Graphs, and more
✓ 100+ Algorithm Tutorials - Step-by-step explanations with code
✓ 14 SQL Categories - From basics to advanced window functions
✓ 500+ Problems - Comprehensive LeetCode coverage
✓ Spaced Repetition - Smart review scheduling for long-term retention
✓ Progress Sync - Track progress across all your devices

Available Categories

Pattern Categories

Two Pointers, Sliding Window, Arrays & Hashing, Linked Lists, Stacks, Heaps, Trees, Graphs, Binary Search, Backtracking, DP, Greedy, Bit Manipulation

Algorithm Categories

Arrays & Strings, Linked List, Trees & BSTs, Graphs, Dynamic Programming, Greedy, Backtracking, Bit Manipulation, Heaps, Math & Number Theory

SQL Categories

SQL Basics, Joins, Aggregation, Subqueries, Window Functions, CTEs, Set Operations, String Functions, Date/Time, Conditional Logic

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