LeetFlash 2.0 is an updated version of the simple Chrome extension that allows users to track their performance on LeetCode problems. With this extension, users can now register and directly connect to the LeetFlash website, where their solved questions will be updated in real-time. This integration with the website enables users to efficiently review algorithm questions, similar to using flashcards for vocabulary learning. The extension also includes a daily reminder feature that notifies users to review their questions at a specific time through Chrome notifications.

For a more comprehensive experience, users can open the LeetFlash website alongside the extension. If the website is linked to the extension, it will receive real-time updates of the user's solved questions. Visit LeetFlash.com or the repository for detailed tutorials and instructions.

Note: Users who only want to use the extension can select the "only extension" option.