This is what a Patternwell review feels like: the problem without its title, then you choose the pattern and the cost before seeing the answer. It's a sample, not a test of you; with an account, reviews come from problems you've actually solved, when you're about to forget them.
In the app, your rating is capped by what actually happened (a wrong pattern can't be rated Easy), and the next review is scheduled for when you'd otherwise forget.
Free for up to 150 problems. Import your LeetCode history or paste problem links; the browser extension (Chrome, Brave, Edge on a computer) tracks new solves automatically.