التقويم الهجري والميلادي is a standard application for managing the Hijri and Gregorian calendars, as well as the Umm al-Qura calendar. The app features an Arabic interface with Arabic numerals and a right-to-left layout. It is a precise application that relies on accurate functions to calculate dates.

One of the main features of التقويم الهجري والميلادي is its ability to calculate the duration between two dates. You can choose to start with a Gregorian date and end with a Hijri or Umm al-Qura date, and the app will calculate the number of days and provide the equivalent duration according to the three calendars (Hijri, Gregorian, and Umm al-Qura).

Additionally, the app allows for easy conversion of dates from Gregorian to Hijri or Umm al-Qura, and vice versa. It also includes prayer times, displayed visually without numbers.