치국이의 퇴근계산 is a free Chrome add-on designed to help users efficiently calculate their attendance times. This tool is particularly useful for individuals who need to monitor their work hours based on a standard 8-hour workday. With its straightforward interface, users can easily input their clock-in and clock-out times to determine their total working hours.

The add-on focuses on essential features, allowing for quick calculations without the need for complex inputs. However, it is important to note that the tool does not support calculations for partial leave (반차). This makes it a streamlined solution for those looking to track standard work hours, ensuring users remain aware of their attendance metrics.