Salary-Due dates is a free Android application developed by mhmmd. It falls under the Utilities & Tools category and is compatible with the Ummulqura Calendar and the Hijri Solar (Hijri Shamsi) Calendar used in Saudi Arabia. The app has various features, including widgets that display a day, time, Lunar Hijri, Solar Hijri, and remaining days until the salary due date.

Additionally, the app can calculate the salary due date for all employees and convert to and from all dates, including Hijri lunar, Solar Hijri (Hijri Shamsi), and AD. The interface is simple and easy-to-use, and the widgets can be customized with different text and background colors.

To add the widget to the home screen, users can press and hold an empty space, tap "Widgets," find "Salary-Due dates," press and hold, and then drag it to the desired home screen. For feedback or issues, users can contact the developer at Overall, Salary-Due dates is a useful and convenient app for those who need to convert and keep track of different calendar systems.