Asystent Librus (Frekwencja i Średnia) is a Chrome add-on developed by Paweł Szewczyk. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This free program allows users to view their weighted average and attendance on the Librus electronic diary.

With this extension, users can calculate their attendance and weighted average directly in their browser without the need to manually calculate or constantly inquire with their teachers. The program offers several features, including the ability to add grades, view yearly and semester averages, simulate averages, and access attendance information.

In addition, users have access to a settings panel where they can customize the display of attendance to suit their needs. The extension's code is fully public and can be found in the information and contact tab or through the provided GitHub link.

Overall, Asystent Librus (Frekwencja i Średnia) provides students with a convenient way to monitor their attendance and weighted average directly within their browser.