What it is: DSAPrep is a personal problem tracker built around spaced repetition. You add problems you've solved, rate your confidence, and the app schedules them for review at increasing intervals: 1 day, 3 days, 7 days, 14 days, and so on, based on how well you knew it. It's the Anki model applied to DSA prep.

Features:

• Add any LeetCode problem (or custom problem) to your tracker

• Confidence-based review scheduling (8 intervals per difficulty)

• Pattern-based grouping (sliding window, two pointers, DP, etc.)

• Notes and flashcards per problem

• Weekly progress email reports

• Leaderboard to compete with friends

• Custom revision intervals for power users

Why: I got tired of grinding LeetCode and forgetting everything a week later.

The pattern was always the same: spend 3 hours on a dynamic programming problem, get it, feel good, then bomb the exact same concept in an interview two weeks later because I never revisited it. I wasn't learning. I was just solving and forgetting in a loop.

So I built DSAPrep.

Link: https://dsaprep.dev

Would love to hear your thoughts!