Spaced Complexity - Companion for LeetCode

Practice LeetCode interview problems from NeetCode 150, Blind 75 and Grind 169, then review missed ones with spaced repetition.

Spaced Complexity helps you learn LeetCode problems instead of seeing each one once. Pick a list, get a random problem, then rate how it went. Problems you struggled with come back on a spaced-repetition schedule until they stick. How it works 1. Choose a list: NeetCode 150, Blind 75, Grind 169, or one you create yourself. 2. Click Go to open a random problem from that list. For NeetCode 150 you can also pick a category such as Trees, Sliding Window or DP. 3. Solve it, then reopen the popup and rate it: Nailed it, Shaky or Missed. 4. Shaky and missed problems return after 1, 3, 7, 14 and 30 days. The extension icon shows how many reviews are due. Features - Built-in lists: NeetCode 150, Blind 75 and Grind 169. Create your own by pasting LeetCode links. - Spaced-repetition revisit queue with a due-count badge on the icon. - Dashboard with progress per list, solved problems highlighted, and the revisit queue with last attempt and due dates. - Daily streak, counted when you rate at least one problem. - LeetCode's daily challenge in one click. - "Solve on NeetCode" toggle: for NeetCode 150 problems, open NeetCode's free workspace instead of LeetCode. - Light and dark mode. - Progress syncs across devices signed into the same browser account. Export and import a backup from the dashboard. Why random practice plus review Working through a list in order makes patterns easy to spot, because you know which topic comes next. In a real interview nobody tells you the topic. Random problems make you identify the pattern yourself, and the review schedule brings back the ones you missed before you forget them. Privacy No account, no ads and no personal data collected. Your progress is stored in your browser and synced through your browser account. The extension contacts LeetCode only when you click the daily challenge button, and the popup loads its typefaces from Google Fonts. Open source: https://github.com/fokude/leetdaily Spaced Complexity is an independent project and is not affiliated with LeetCode or NeetCode.