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) How it works

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.

The schedule bends toward your weak spots

Every rating reshapes your queue. Problems you stumble on resurface while they're still fresh enough to fix; the ones you've locked in drift further out, so you're never burning reps on what you already know cold.

SpaceDSA rating widget on a solved LeetCode problem

Two seconds per problemSolve it, rate it, move on — and let SpaceDSA do the remembering for you.

Stop forgetting the patterns you already grinded.

Install SpaceDSA, solve like normal, and let spaced repetition bring each problem back right before it slips away.

Add SpaceDSA to Chrome (free)