✠ Antidoron
Sources

Whose words these are.

The prayers belong to the Church. The English belongs to whoever translated it, so every text in the app names its translation, and only free or public-domain English is used until a Church body grants its own.

The calendar and the readings

Orthocal (orthocal.info), an open-source liturgical calendar by Brian Glass, MIT licensed, computes the Paschal cycle, the tone, the fasting rules with their exceptions, the commemorations and the lectionary for both the New and the Old Calendar. We cache its answers and a priest can correct any day for everyone.

The Scripture readings are the King James Version, public domain.

The Bible and the Psalter

The Old Testament is the Septuagint in English: Sir Lancelot Brenton's 1851 translation of the Greek, with Michael Paul Johnson's spelling updates (LXX2012, eBible.org), public domain. It carries the Church's psalm numbering and the books the Church kept. The second translation is the King James Version with Apocrypha, the 1769 text from eBible.org, public domain outside the United Kingdom. The third is the World English Bible (eBible.org), a modern-English translation with the deuterocanon, dedicated to the public domain.

The library

The Hours, the prayers before Communion, the prayers for the departed and the form at the close of day are from Isabel Florence Hapgood's Service Book of the Holy Orthodox-Catholic Apostolic Church (Houghton Mifflin, 1906; second edition 1922), public domain, with its spelling and punctuation lightly modernized and the psalms as she printed them. Each text names this on its own page.

The lives of the saints that Orthocal carries belong to the Orthodox Church in America; the app shows the saints' names and does not republish those texts.

The fixed prayers

TextTranslation
The OpeningTraditional English; public domain
The Trisagion PrayersIsabel F. Hapgood, Service Book of the Holy Orthodox-Catholic Apostolic Church (1906, 2nd ed. 1922); public domain
Troparia to the Holy TrinityIsabel F. Hapgood, Service Book (Midnight Office); public domain
Psalm 50King James Version (Psalm 51 in the Hebrew numbering); public domain
The Symbol of FaithTraditional English; public domain
The Prayer of St. Ephrem the SyrianTraditional English; public domain
The Jesus PrayerTraditional; public domain
To the TheotokosTraditional English; public domain
The Prayer of St. SimeonKing James Version (Luke 2:29-32); public domain
The DismissalTraditional English; public domain

What is not in the app yet

The troparia and kontakia of each day, the full morning and evening prayers in the Antiochian Archdiocese's English, and the Psalter in kathismata. These are copyrighted translations and are added only with the blessing of the body that owns them, credited on every screen where they appear.