PMCA is a free Chrome extension developed by Haolin Zhong. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools.

PMCA is designed to help you track your LeetCode progress and improve your algorithm skills. It utilizes Ebbinghaus's Forgetting Curve to prompt you to review problems at the most optimal times.

To get started, simply install the PMCA extension in your web browser. As you solve and submit LeetCode problems, PMCA will set the next review time for each problem based on the Ebbinghaus forgetting curve.

By opening PMCA, you can easily view the problems that need to be reviewed now, problems scheduled for future review, and the problems you have already mastered. You can also switch between the LeetCode global site and the LeetCode CN site using the switch in the popup page.

With PMCA, you can practice and improve your algorithm problem-solving skills in the most efficient way. Start using PMCA today and enjoy coding!