FSRS, not flashcard guesswork
Every grade updates a stability and difficulty estimate per problem, then schedules the next attempt for the day you are about to forget it.
FSRS drill book
Stop re-solving the same problem for the first time.
Drill NeetCode 150, DeepML and your own problem lists on an FSRS schedule, so the patterns stay in memory instead of leaking out a week later.
Problems, not trivia
A card is a problem you re-solve — NeetCode 150 and DeepML ship built in, with a link straight through to the judge.
Bring your own list
Build a list in the browser or paste one in. Categories, difficulty and links, straight into the rotation.
Tune the scheduler
Desired retention, daily caps, learning steps, fuzz and the raw FSRS weights are all yours to change.