Ask Aquinas: Catholic AI

Welcome to Ask Aquinas. Ask anything on the Catholic Faith and read the answer with its sources: Scripture, the Church Fathers and St. Thomas Aquinas.

The Faith, as it has always been taught. From the makers of Sanctifica.

Ask any question about the Catholic Faith in your own words: doctrine, Scripture, the saints, the sacraments or the liturgy. Ask Aquinas answers from Scripture, the Church Fathers and St. Thomas Aquinas, and shows you every source.

EVERY ANSWER SHOWS ITS SOURCES Each answer is drawn from a fixed library of traditional Catholic texts, never the open web. Every claim is numbered to the passage it comes from. Tap a citation to read the full passage: the article of the Summa, the verse and its commentary, the Father's homily.

CERTAINTY, STATED PLAINLY Answers are marked Well supported, Partly supported or Few sources, and teaching is marked as defined doctrine, common teaching or theological opinion. Where the Church has settled a question, Ask Aquinas says so. Where the Church has left it open, it sets out each position held by approved theologians.

NO NEWS. NO POLITICS. Only the questions that don't go out of date, answered from what the Church has always taught.

EVERY DAY • Today's feast, the Mass readings and a question from the day's Gospel • Ask where to find a Latin Mass, and see nearby Masses on a map • Save passages and answers to your Notebook

THE LIBRARY • Summa Theologica, St. Thomas Aquinas • The Church Fathers: Ante-Nicene, Nicene and Post-Nicene • Douay-Rheims Bible (Challoner revision) • Haydock Bible Commentary • Catholic Encyclopedia (1907–1914) • Lives of the Saints, Rev. Alban Butler • The Liturgical Year, Dom Prosper Guéranger • Roman Martyrology

FOR EVERYONE WHO LOVES THE FAITH • New to the Faith: start with the questions converts ask first. • Going deeper: read the Summa, the Fathers and this Sunday's Gospel, and save what moves you to your Notebook. • Defending it: find the objection, the reply and the Father who answered it first. • Teaching it: turn this Sunday's Gospel into a lesson, with sources you can cite. • Priests and religious: prepare a sermon from the readings of the day.

FROM THE MAKERS OF SANCTIFICA Ask Aquinas began inside Sanctifica, the traditional Catholic app for prayer and the liturgical year. Already use Sanctifica? Sign in with the same account.

FREE, PRO AND PRO+ Try 3 Considered answers without an account. A free account adds Brief answers every day and 3 Considered answers a week, with every source shown.

Ask Aquinas Pro adds: • 100 deep answers a month, Considered or In-depth (an In-depth answer counts as two) • In-depth answers and disputations, as in the Summa • Listen to every answer, with word-by-word read-along • Write with Ask Aquinas: 30 drafts a month for sermons, lessons and reflections • Guided studies, and a PDF of your Notebook

Ask Aquinas Pro+ adds: • 220 deep answers a month • 100 Write drafts a month

SUBSCRIPTION DETAILS Ask Aquinas Pro and Pro+ are available as monthly or yearly auto-renewing subscriptions. Payment is charged to your Apple Account when you confirm your purchase. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription in your App Store account settings.

Answers are AI-generated from approved sources. They are not a substitute for a priest or spiritual director.

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