Ultimate Web Blocker is a Chrome add-on designed to enhance productivity by allowing users to block distracting websites effectively. This free tool provides several features, including the ability to block an unlimited number of websites either permanently or on a user-defined schedule. Users can also create a focus group that allows access only to selected websites, promoting a more concentrated browsing experience.

The extension is continually evolving with planned future features aimed at increasing user accountability, such as requiring math questions to unblock sites and a humorous guilt trip for uninstallation attempts. Recent updates have improved functionality and user interface, ensuring a smoother experience when setting website blocks and schedules.