The BlackBerry version of the calendar includes the full calendar of saints, which makes it distinguishable, in addition to the fact that it doesn’t require internet connection. On a BlackBerry this may seem irrelevant, but one might find himself without internet connection even on a BlackBerry device, while on roaming or on places such as the Holy Mount of Athos, or the Mount Sinai.
Apart from that, the app includes links to an online calendar, with lifes of the saints, services, icons and daily readings, and a link to the official typikon for the services of the Russian Orthodox Church.
It follows the old (i.e. Julian) calendar and is fully in Russian language.
Purchase the app from the BlackBerry App World: http://appworld.blackberry.com/webstore/content/75850?lang=en