의무통화 is a free Android app developed by 최두수. It falls under the category of Business & Productivity and serves as a call management tool.

This app provides users with the total number of calls made and the duration of calls from the 1st of the month until the present day. It also allows users to make immediate calls by pressing the 131 button. Additionally, users can set a timer to automatically end calls at a specified time. Multiple numbers can be registered, enabling users to make calls in a rotational manner.

It should be noted that there have been reports of the timer not functioning properly, so it is recommended to use it as a supplementary tool and manually confirm call durations. The timer starts running as soon as it is pressed, which may result in slight discrepancies between the actual call duration and the timer's recorded time.

Please keep in mind that this app is for reference purposes only and may have some margin of error.