If you're looking for an app that can calculate your age in both Hijri and Gregorian dates, then "احسب عمرك في كل مناسبة" by التوحيد سوفت is the perfect app for you. It also allows you to calculate your age in seconds, minutes, hours, days, weeks, months, and years, and know the second date (Gregorian or Hijri). The app further helps you in discovering your birthday, your sun sign, and Chinese zodiac sign.

One of the unique features of this app is that it allows you to calculate the wasted times of your life. You can also know the difference between two dates and find out the difference between you and someone else. The app also allows you to transfer from Hijri to Gregorian and vice versa, add special occasions, and set reminders for all events that have been added by you. Lastly, you can also know the United Nations World Day and recall it using this app.

Overall, "احسب عمرك في كل مناسبة" is a must-have app for anyone who wants to keep track of their age and important dates while also discovering new information about themselves.