Free Chrome extension

Stop re-solving LeetCode problems you've already seen.

SpaceDSA schedules every problem you finish with spaced repetition. You remember the 12 patterns that cover 79% of FAANG interviews, instead of forgetting them between sessions.

Add SpaceDSA to Chrome (free) Get the free pattern guide

Free forever. No account required to start. Works on leetcode.com.

SpaceDSA spaced-repetition queue inside LeetCode

patterns cover 79.1% of FAANG algorithmic questions (n=698 interviews)

43%

of questions reduce to just 3 patterns: DFS, Arrays/Hashing, DP

retention vs. raw re-grinding, in classic spaced-repetition trials

Why grinding more problems isn't working.

You solved Two Sum in March. It's October. The interview is Tuesday. Can you recall the optimal approach in 30 seconds, out loud, without notes?

Most candidates can't. The fix isn't more problems. It's better timing.

Auto-scheduling on leetcode.com Solve a problem, SpaceDSA picks the next review date using the SM-2 algorithm, the same spaced-repetition engine behind Anki.
Pattern-aware review queue Reviews are clustered by pattern (Sliding Window, DP, etc.) so you stay sharp on the 12 shapes that actually show up.
Rate yourself in one click Tag each attempt as Easy / Good / Hard. SpaceDSA stretches or compresses the interval automatically.
Built into the LeetCode page No separate app. No copy-paste. The review widget lives next to the problem.

One-click rating, automatic re-scheduling

After each solve, rate the problem Easy / Good / Hard. SpaceDSA stretches or compresses the next review interval using the SM-2 algorithm (the same engine behind Anki), so the patterns you struggle with come back more often.

SpaceDSA rating widget on a solved LeetCode problem

Built into the LeetCode problem pageNo separate app, no copy-paste, no extra tab to babysit.

Free guide: The 12 FAANG patterns, measured against 698 real interviews

For each pattern: the linguistic cue that tells you it's that pattern, the 3 canonical LeetCode problems to drill, and the complexity to state out loud. Plus the 21% of FAANG questions the patterns don't cover, and what to do about them. Drops next week, leave your email and we'll send it the moment it's live.

Stop re-solving LeetCode problems you've already seen.

Why grinding more problems isn't working.

One-click rating, automatic re-scheduling

Free guide: The 12 FAANG patterns, measured against 698 real interviews

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