LeetCode Mistake Tracker is a free Chrome extension developed by architec that aims to assist LeetCode users in efficiently keeping track of the questions they would like to re-do in the future. With this extension, users no longer need to navigate back to their LeetCode history to find specific questions.

This handy tool provides a countdown timer feature, allowing users to set a reminder for when they want to revisit a particular question. By simply clicking on the extension icon, users can add a question to their tracking list and set the desired countdown time. The extension then displays the remaining time until the question is due for re-attempt.

With its intuitive and user-friendly interface, LeetCode Mistake Tracker makes it easy for users to stay organized and focused on their learning journey. By eliminating the need for manual tracking and simplifying the process of revisiting questions, this extension enhances productivity and efficiency for LeetCode users.