Sharpen your skills with a new coding challenge every day. Track streaks, earn LeetCoins, and join engineers who show up every day.
From quick daily nudges to deep topic dives — built for the grind.
A fresh coding or CS question every day. Algorithms, system design, trivia — all in 5 minutes.
Don't break the chain. Daily reminders keep you accountable and your streak alive.
Earn coins for correct answers and streaks. Spend them on premium hints and explanations.
Targeted question sets for SWE interviews — arrays, trees, dynamic programming, and more.
See your accuracy, topics mastered, and streaks over time. Know exactly where you stand.
Built with the #100DaysOfCode spirit. Share your progress, compete on leaderboards.
Three steps to a better brain. Every single day.
Open the app — your challenge is waiting. Algorithms, trivia, system design. 5 minutes max.
Correct answers earn coins and keep your streak alive. Wrong? No shame — that's learning.
Daily nudges make it easy. The longer the streak, the more you learn. Miss a day? Come back stronger.
Everything you need to build a daily habit, at zero cost.