Train Your Pattern Recognition
Stop memorizing solutions. Learn to identify the right approach before you start coding — just like in real interviews.
100% free — Supports NeetCode 150 and LeetCode 75 with AI-powered hints
Why Pattern Recognition?
The skill that separates good developers from great ones
The Problem
Solving hundreds of problems doesn't teach you to quickly identify patterns during interviews. You memorize solutions, not approaches.
The Solution
Train pattern recognition as a separate skill. Identify the approach before solving, just like in real interviews.
How It Works
Open a problem
On LeetCode
Guess the pattern
Before you see hints
Learn & improve
Track your accuracy
15 Core Patterns
Hash Map, Two Pointers, Sliding Window, Binary Search, DP, Greedy, Backtracking, DFS, BFS, Stack, Linked List, Heap, Trie, Union Find, Topological Sort
AI-Powered Hints
Stuck? Get progressive Socratic hints that guide your thinking without giving away the answer. 3 hints per problem.
Popular Problem Lists
NeetCode 150, LeetCode 75, and the first 100 LeetCode problems. Continuously adding more.
Track Your Progress
See which patterns you're strong at and which need more practice. All data stays private on your device.
FAQ
Yes! Completely free. No credit card, no hidden fees, no premium tier.
LeetCode's first 100 problems, NeetCode 150, and LeetCode 75. We're continuously adding more based on feedback.
When you're stuck, you get progressive Socratic-style hints that guide your thinking without giving away the answer. Each problem has 3 hints that gradually point you toward the right pattern.
That's exactly what it's for. Pattern recognition is the skill that lets you quickly identify the right approach, leaving more time for implementation.
All stats are stored locally in your browser. Your accuracy by pattern and attempt history stay private on your device.
Ready to level up?
Get notified when PatternPulse launches. It's completely free.
Works on any Chromium browser (Chrome, Edge, Brave, Arc)