CF Gym Lens is a free Chrome add-on designed to enhance the user experience on Codeforces by adding a dedicated Gyms tab to user profiles. This innovative feature allows users to easily access their gym participation history, providing a comprehensive view of their involvement in various contests. The add-on integrates seamlessly into the existing profile layout, situated conveniently next to the 'Contests' tab.

The add-on offers rich participation data, displaying key details such as contest names, types, duration, solved problems, and submission counts. Users can benefit from smart sorting options to organize their gym history by date, difficulty, or performance. Additionally, CF Gym Lens allows for direct navigation to any Gym contest with a single click, making it a practical tool for competitive programming enthusiasts.