Afghan Calendar is a free Android application developed by Falcon Tech LTD. This business and productivity app offers a Shamsi/Gregorian calendar, date converter, and appointment manager with notes.

The app's main feature is the Shamsi/Gregorian calendar, which allows users to easily switch between both calendars. The date converter feature also allows users to convert dates from one calendar to the other. The appointment manager feature allows users to create appointments and add notes to them, making it easy to keep track of important events.

Overall, Afghan Calendar is a useful app for those who need to manage appointments and work with both Shamsi and Gregorian calendars. The app is user-friendly and offers a simple interface, making it easy to navigate and use.