Православный календарь is a free Android application developed by NeoSphere that provides an extensive Orthodox calendar. Created with the support of the portal Православие.ru, the app displays both old and new styles of the calendar with the dates of Easter, great and twelfth holidays, and fasting days. Users can view prayers and icons of saints commemorated on a given day. Additionally, the app includes daily thoughts from Saint Theophan the Recluse and offers two widget sizes, 2x2 and 4x4. It is important to note that the app features high-quality icon images and prayer hymns that are loaded from the server, which may incur data charges based on the user's mobile plan.