Православный церковный календарь is an Android application developed by Izrada Android Aplikacija, available for free. The app falls under the Education & Reference category and is a comprehensive guide to the Orthodox Church calendar. It covers the years from 2014 to 2030 and provides daily views of dates in both the Gregorian and Julian calendars, along with fasting periods.

The app also includes a prayer book with over fifty prayers, making it a perfect companion for those who wish to deepen their spiritual practice. The Church calendar is automatically adjusted for movable holidays and fasting periods based on Easter and lunar cycles. Additionally, the app offers an alarm feature and a widget option, making it easy to access and use.