Stop forgetting patterns. Our LCM 1.1 algorithm predicts your forgetting curve with 4.4% error, scheduling the next review based on your recall— sooner if you struggled, later if you nailed it.
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A review system grounded in spacing + active recall—so patterns stick under pressure, not just on day one.
You forget quickly without revisiting. We bring problems back right before you’re likely to forget them.
Re-reading feels productive; recalling builds memory. Reviews force active recall of the pattern and approach.
A little struggle is a feature. Your ratings keep reviews challenging—not random and not overwhelming.
Real interviews mix topics. Your schedule rotates patterns so you learn to switch tools, not just repeat one.
We tuned our spaced repetition algorithm specifically for coding interviews. It outperforms traditional models like SM-2.
Root Mean Square Error (RMSE) comparison on 728M+ reviews.
LCM 1.1 adapts to your memory patterns with unmatched precision.
A complete system designed to optimize your study time and retention.
Our LCM 1.1 algorithm adapts to your brain memory patterns much faster and better than generic tools.
Wake up to a perfectly curated list of problems due for review. No more guessing what to study.
Learn the underlying 19+ patterns behind every LeetCode problem, from Sliding Window to DP.
3,700+ LeetCode problems, plus curated interview lists like NeetCode All/150/250 and Blind 75—organized for durable recall.
Customize the spaced repetition parameters to fit your interview timeline, from 1 month to 1 year.
Visualize your retention rate, streak, and mastery across different difficulty levels.
Your brain starts forgetting immediately after practice. The trick isn’t grinding more—it's reviewing at the right moments. SpacedSmart surfaces problems right before you’re likely to forget them, so recall becomes durable (and fast) under pressure.
Most people don’t fail interviews because they can’t solve problems—they fail because the right pattern doesn’t come to mind fast enough. This is built to turn practice into durable recall.
Given an array of integers nums and an integer target, return indices of the two numbers...
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