Greek Orthodox Calendar is a lifestyle app developed by Eir3 Apps that provides a comprehensive calendar of feasts and saints, as well as fasting and period of the year information, for any day, past and future. It also includes links to daily readings and the typikon. This app is a great tool for Orthodox Christians who want to keep track of important dates and religious events.

One of the best features of Greek Orthodox Calendar is that it does not require an internet connection. This means that it can display the feast or the saints of the day, even if you are on Sinai or Mount Athos. The app also allows users to navigate to any day, past or future, on a date basis or in regard to the paschal period. However, it is important to note that one should not rely too much on the fasting info displayed and should instead talk to their priest.

Furthermore, the app provides notifications about tomorrow's feast, which is a helpful reminder for users. It is also worth mentioning that the application was made free through the generosity of the pious Orthodox Christians: Vladimir, Vladimir, Tatiana, Viachelsav, and the reposed Ivan.

Overall, Greek Orthodox Calendar is a reliable and informative app that is a must-have for Orthodox Christians who want to stay connected to their faith and religious practices.