Introibo: TLM App

Introibo: TLM App

Latin Mass Prayer Companion

58 ratings
21 reviews
Free

Details

  • Released
  • Updated
  • May 12, 2026
  • August 9, 2026

Features

Introibo: TLM App screenshot #1 for iPhone
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Introibo: TLM App screenshot #9 for iPhone
Introibo: TLM App screenshot #10 for iPhone
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About

This prayer companion is designed for the traditional Catholic life, offering full support for various Roman Missal and Roman Breviary rubrics. It provides daily prayers, liturgical calendar information, and fasting/abstinence guidelines, all available offline and without subscriptions or tracking.

Traditional Roman Missal and Breviary support
Daily feast, proper of the Mass, and Divine Office
Liturgical calendar with feast details
Fasting and abstinence guidelines
Offline access
Multiple rubric sets (1962, 1955, pre-1955)
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What's New in Introibo

1.2.3

August 9, 2026

WIDGETS Bring the liturgical day to your Home Screen: Today's Feast, a Daily Reading, the Divine Office hour by hour, your chosen prayers for morning, midday, and evening, and a Sanctorale widget showing where you are in the Church's year and the saints ahead. Small and large sizes are each designed for their space, styled like a missal page. Ribbon markers, drop caps, and the day's liturgical color. THE YEAR AT A GLANCE A new year overview in the calendar: the seasons as bands, with a "you are here" marker. Jump straight to the moveable feasts: Easter, Ascension, Pentecost, Corpus Christi, Christ the King. Month cells now mark vigils, octave days, Ember days, and days of penance. An optional Upcoming Feasts card on the Home screen (off by default and enable it in Settings). THE MOST ACCURATE TEXTS WE HAVE EVER SHIPPED We audited every day of the liturgical year against primary sources: every hour of the Breviary and every Mass, in all three supported rubrics (1962, 1955, pre-1955): The Divine Office now renders feast and commemoration propers in full: the correct ferial Matins psalter, proper psalm assignments at Matins, Lauds, and Vespers, the commune responsories, the Great O antiphons, the Triduum collects, and the Roman (not monastic) Vespers structure. The Canon of the Mass is complete on the great feasts: the proper Communicantes no longer truncates, the 1962 Canon adds the St. Joseph clause, the dismissal precedes the Placeat, and the communion of the faithful includes the Ecce Agnus Dei. Sequences restored (Victimae paschali, Stabat Mater, Dies irae), Trinity Sunday's introit corrected, Holy Name Sunday's Mass and Office repaired, and hundreds of oration and calendar corrections. Also in this release: text-size accessibility improvements throughout.

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User reviews

Fr.

INTROIBO is perfect - well, nearly perfect (for all my needs). When INTROIBO includes a Latin/SPANISH language option, it will have attained ultimate perfection. In all seriousness, this is a magnificent and most helpful App meant to help every devout soul; for the traveling priest, it is especially beneficial. I thank God for this gift.
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No Latin-Spanish

So many updates and none for a upcomming Latin - Spanish speaking

UX isn’t as good as could be

Font size too small for some elements. Doesn’t change between dark and light theme with the system. Doesn’t allow texts to be copied. App still seems to be slow and sluggish sometimes.

The Best Traditional Catholic App!

Thank you creating this app! It is well designed, user friendly, an invaluable spiritual aid, informative, focused without unnecessary distractions, and has a zero stress factor in using it. The Holy Spirit must have breathed inspiration upon you to develop such a divine tool for the laity! Thank you and God Bless you! Pax vobiscum sit.
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Response from developer

Thank you so much for your support. There is much more to come, so we’re happy you have enjoyed it so far.

Outstandingly Thoughtful and Comprehensive Catholic Lifestyle Companion

This app offers it all: Mass, prayers, daily asceticisms, and tutorials. I am grateful for the hard work put into this piece of software that will, no doubt, help countless people nurture a love of traditional Catholic life.

FAQ

What rubrics does Introibo support?

Introibo offers full support for the 1962, 1955, and pre-1955 rubrics of the Roman Missal and Roman Breviary, allowing users to choose their preferred tradition.

Does Introibo have ads?

No, Introibo is completely ad-free, ensuring an uninterrupted prayer experience.

Can I use Introibo offline?

Yes, Introibo is designed for offline use, meaning you can access all its features without an internet connection.

What information is available on the Hodie screen?

The Hodie screen displays today's feast, the proper of the Mass, the Divine Office, fasting and abstinence obligations, the daily psalm, and the seasonal Marian antiphon, all based on the traditional calendar.

How does Introibo handle fasting and abstinence?

Introibo provides three penance disciplines: 1962 norms, 1917 Code of Canon Law, and stricter pre-Pius XII observance, clearly outlining obligations and restrictions.

What devices is Introibo available on?

Introibo is available for iPhone and iPad devices.

How often is Introibo updated?

The app was last updated on June 10, 2026, indicating a commitment to ongoing maintenance and improvements.

Does Introibo require an account or track users?

No, Introibo does not require an account and explicitly states that it does not track users, prioritizing privacy.