Built from the ground up to help you understand your weaknesses and turn them into strengths.
Attempt Tracking
Log every attempt with outcome, language, time taken, and mistake categories. Never lose context on a problem again.
Analytics Dashboard
Visualize your daily streaks, solve rates by difficulty, and progress over time with an activity heatmap.
Pattern Recognition
Tag problems by algorithmic patterns — dynamic programming, graphs, sliding window — and pinpoint exactly where you struggle.
Problem Notes
Write structured notes per problem. Organize them by tag: learning, review, interview prep, or strategy.
Custom Lists
Curate your own problem sets for interviews, company-specific prep, or focused topic drilling.
Progress Mastery
Problems move from Unseen → Attempted → Solved → Mastered. Always know where you actually stand.
Fully open source, forever free
Leetly is MIT licensed. Self-host it on your own infrastructure, extend it with custom features, or contribute back to the community. No vendor lock-in, no paywalls.