Sacred Tradition brings together in one app the three sources of Catholic life: the daily Liturgy, the Bible commented on by the Fathers of the Church, and the Catechism of the Catholic Church.
A companion for praying, reading, deepening, and studying the faith — at any time of day.
— Complete daily Liturgy with Gospel of the day and saint of the day
— Complete Catholic Holy Bible, 73 books
— Catena Aurea of St. Thomas Aquinas: 12,939 patristic commentaries
— Complete Catechism of the Catholic Church, 2,865 paragraphs
— Works offline, no login, no ads
The Daily Liturgy
The Screen of the Day brings the complete Catholic liturgy: liturgical date with the color of the season, saint of the day or fixed feast, first reading, responsorial psalm, second reading when there is one, and the Gospel verse by verse. The typography was chosen for lengthy reading — EB Garamond for the sacred text, Inter for the interface — and the font size has three levels for different times of the day. The liturgical calendar follows the universal Roman norms with Brazil's own calendar: Sundays, solemnities, feasts, and memorials are distinguished with the correct canonical precedence.
The Holy Bible
The Catholic Bible offers the translation of Fr. Manuel de Matos Soares, with the 73 books, 1,333 chapters, and 35,591 verses of the Catholic canon. The reading is navigable by book and chapter, with text search and selection of verses to share, bookmark, or copy.
The Catena Aurea
The Catena Aurea is the heart of Sacred Tradition. Compiled by St. Thomas Aquinas in the 13th century, it brings together commentaries from the Church Fathers on the four Gospels. This edition features 12,939 commentaries from 57 Fathers — Augustine, Chrysostom, Jerome, Ambrose, Gregory the Great, Bede, Origen, and many others — automatically connected to the Gospel of the day. The texts were translated from Spanish and are under editorial curation.
The Catechism of the Catholic Church
The Catechism comes in its entirety: 2,865 paragraphs organized into four parts, with accent-insensitive text search and navigation of the entire book to each paragraph. Magisterial footnotes are present, and the search finds occurrences regardless of whether the user writes with or without accents.
Sharing the Faith
Card generation for sharing is integrated with the three sources: a passage from the Gospel of the day, a patristic commentary, or a paragraph from the Catechism can be transformed into an image in the liturgical color of the season—ready to send to a friend or post as a Story.
Privacy by Absence
Sacred Tradition works entirely offline after installation. There is no login, registration, ads, tracking, or collection of personal data. All browsing, reading, and searching happens locally on the device. Dark mode follows the system.

Three Sources, One Revelation
The app's architecture follows the dogmatic constitution Dei Verbum of the Second Vatican Council, which recognizes Sacred Scripture, Sacred Tradition, and the Sacred Magisterium as sources of Divine Revelation. Each has its own tab; the daily Liturgy is where all three meet in action.
The sacred texts are in the public domain or used with credit to the original translators, as detailed in "On Sacred Tradition".

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