Crkveni Kalendar is an Android application that serves as a comprehensive Orthodox Christian calendar with the lives of the saints. The app includes yearly updates to the calendar, prayers, commandments, Easter dates, moon phases for the current year, and Serbian Orthodox names. Additionally, users can add their own prayers to the app.

One of the most useful features of the app is the option to receive notifications for holidays, slavas (patron saint days), the beginning or end of a multi-day fast, and one-day fasts. The app is free and is perfect for anyone looking for a reliable source of Orthodox Christian information and guidance.