ReMCode

Spaced repetition for the LeetCode and NeetCode problems you solve.

Solving 300 problems doesn't help much if you can't remember how you solved number 40. ReMCode turns every LeetCode and NeetCode problem you solve into a flashcard and brings it back for review right before you'd forget it. HOW IT WORKS • Solve a problem. When your submission is Accepted, a small window opens with the problem's title, difficulty and the exact code you submitted. • Write a one-line "key insight", the sentence that will jog your memory later. • Rate how hard it was: Again, Hard, Good or Easy. The FSRS spaced-repetition algorithm schedules the next review. • That's it: nothing to copy or paste. Press 3 and the problem is saved. ACTIVE RECALL REVIEWS Reviews take a minute or two, not twenty. You read the problem and work out the pattern, the key invariant, the complexity and a rough version of the code. Then reveal your notes and your syntax-highlighted solution, and rate yourself. Topic tags stay hidden until the reveal, so "Two Pointers" doesn't give the answer away. A scratch pad saves your answer with each review, so you can see how your thinking changed over time. FEATURES • Toolbar badge with the number of problems due today • "Save to ReMCode" button on every problem page, for problems you solved before installing • Add problems by hand from a LeetCode number or link, or from anywhere else (a book, an interview) • Library with search, filters (status, site, difficulty, topic) and sorting, including "most forgotten" • Card pages with every saved solution, scheduling stats and the full review history • Adjustable target retention (80–97%) and a daily review cap • Keyboard shortcuts throughout: 1–4 to rate, Space to reveal, Esc to skip • Light and dark themes; the on-page window matches the site's theme • Optional GitHub sync to a private repository you own, so all your browsers share one deck • Export and import your deck as JSON at any time PRIVATE BY DESIGN • No account, no analytics, no ReMCode server • Your deck is stored locally in the browser's extension storage • Nothing leaves your browser unless you turn on GitHub sync, and then it only goes to your own repository • The extension only reads LeetCode's and NeetCode's submission results so it can tell when a solution is accepted. It never changes them. ReMCode is an independent project and is not affiliated with LeetCode or NeetCode.