Comparison

Liber Pro vs Aquinas Audio Summa

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Liber Pro

This app provides a digital version of the 1961 Liber Usualis, a comprehensive book of Gregorian Chant. It features a dynamic calendar, searchable content, user-defined bookmarks, and annotation tools for easy navigation and study.

Highlights
  • 1961 Liber Usualis eBook
  • Dynamic liturgical calendar
  • User-defined bookmarks
  • Text-based search
  • Annotation tools
  • Browser-like navigation
Features
Read full description

Liber Pro takes the 1961 Liber Usualis, a book of over 2,300 pages of Gregorian Chant for use throughout the liturgical year, and literally puts it at your fingertips on your iPhone, iPad, or iPod Touch. Liber Pro adds to this tome a linked table of contents, user-defined bookmarks, vertical and horizontal paging and zooming, browser-like navigation, a dynamic liturgical calendar, and more. Liber Pro is more than just an eBook. It is also a complete 1961 Roman Calendar, capable of calculating the moveable feasts throughout the year automatically. This means you can select a date; view the proper, common, and feria for that date; and jump instantly to the relevant pages in the Liber Usualis. FEATURES: Browser: - 1961 Liber Usualis: over 2,300 pages - Scroll, zoom, and page with touch gestures - Simple “Back” and “Forward” buttons traverse browsing history - Browse in portrait or landscape orientation - Option to hide view selector for additional viewing area - Selectable paging direction: up and down or left and right - Selectable overlay eases page viewing - Two-finger tap brings up markup palette (In-App Purchase Required) Calendar: - Calculates the day’s feast from the calendar of 1961 - Links to the starting page of the proper, common, and feria of the day - Select today, the next or previous day, the next or previous week, or choose a day with a date picker Bookmarks: - User-defined bookmarks retain page, position, and zoom - List of bookmarks can be reordered and individual bookmarks deleted Table of Contents: - Extensive table of contents provides links to Masses, offices, rubrics, and much more History: - Provides links to the 100 most recently visited pages this session Search: - Text-based search of the Liber - Tap a search result to jump to the page Annotations: - iPhone/iPod - Three drawing tools plus selection tool - Freeform or four-point-fill drawing modes - Four colors available plus ability to white page text out - iPad - Includes all annotation features available for iPhone/iPod - Additional highlighter tool - Four point line-to mode - Twelve color palette

About

Aquinas Audio Summa

Explore the foundational concepts of theology through an audio presentation of St. Thomas Aquinas's Summa Theologica, Part 1. Sample sermons for free and upgrade for unlimited access to the complete library of talks, streamed directly to your device.

Highlights
  • Audio presentation of Summa Theologica Part 1
  • Covers 126 questions across five sections
  • Streamed audio, no device storage used
  • Works on iPhone and iPad
  • Free sample sermons
  • In-app upgrade for full access
Features
Read full description

*Get it once in the app store, and will work on both your iPad and iPhone* An audio presentation of Part 1 of the most famous work of St. Thomas Aquinas, the Summa Theologica (best known simply as "The Summa") written between 1265–1274. The Summa's topics follow a cycle: the existence of God, God's creation, Man, Man's purpose, Christ, the Sacraments, and back to God. The entire work covers this cycle in three main parts known as Pars Prima (Part 1), Pars Secundae (Part 2), and Pars Tertia (Part 3). This app is ONLY Part 1 (Pars Prima), consisting of five sections (The One God, The Blessed Trinity and Creation, The Angels and the Six Days, On Man, and On Divine Government), covering 126 questions. This audio presentation is read from the translation by the Fathers of the English Dominican Province. Will work on your iPad as well as your iPhone (see instructions below). Download the app for free and sample some of these audio sermons. Upgrade to the full version to have unlimited access to the complete library of talks. HOW IT WORKS These MP3s are streamed, not downloaded, so they take up no storage space on your device. A connection is required for the MP3 to play properly. To own these MP3s to manage yourself, go to our website and join the download service. REINSTALL OR PUT ON iPAD If you need to reinstall this app or wish to add it to another iPhone, iPad or iPod Touch, download the free version, select the "Upgrade" button, and go through the purchase process again. If using the same iTunes account, you will not actually be charged again. HAVING PROBLEMS? *If you experience any problem, first try uninstalling and reinstalling the app. You have to go through the purchase process again, but you are not actually charged again if using the same iTunes account* To learn more about our other Catholic audio apps, or to download our MP3 libraries, visit www.catholicvault.com.

Screenshots

Liber Pro4 screens
Aquinas Audio Summa4 screens

Verdict

The call

The clearest difference is review sentiment: Liber Pro at 86% against Aquinas Audio Summa's 0%. Liber Pro also leads on in-app purchases (none vs 1). Aquinas Audio Summa's advantage is rating (4.9 vs 4.4) and iOS requirement (12.0 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Aquinas Audio Summa sells 1 one-off in-app purchase. Liber Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Aquinas Audio Summa holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 8 and 7 respectively. Written reviews complicate that: 86% of Liber Pro's written reviews are positive against 0% of Aquinas Audio Summa's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Liber Pro ships an update every 13 months, Aquinas Audio Summa every 11 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Liber Pro versus Aquinas Audio Summa: the parameters behind the verdict, then further details
ParameterLiber ProAquinas Audio Summa
PriceFreeFree
Rating4.4 (8 ratings)4.9 (7 ratings) — better
Positive reviews85.7% of reviews — better0.0% of reviews
Number of ratings8 — better7
Update frequencyEvery 13 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.612.0 — better
Further details — not scored
Size132 MB14 MB
Age rating4+4+
DeveloperJames FryarWGQM Partners, LLC

Customer experience

Liber Pro

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews14 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Aquinas Audio Summa

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Liber Pro

No in-app purchases

1 purchases

Aquinas Audio Summa

One-time1
  • Audio Catholic Summa Full Library$5.99

Questions

Is Liber Pro free?
Liber Pro is free to download, with no in-app purchases.
Is Aquinas Audio Summa free?
Aquinas Audio Summa is free to download, with in-app purchases available.
Which has better reviews, Liber Pro or Aquinas Audio Summa?
Aquinas Audio Summa is rated higher. Liber Pro averages 4.4 out of 5 from 8 ratings, while Aquinas Audio Summa averages 4.9 from 7 ratings.
Do Liber Pro or Aquinas Audio Summa have ads?
Neither Liber Pro nor Aquinas Audio Summa shows ads.
Which is updated more often, Liber Pro or Aquinas Audio Summa?
Liber Pro ships an update every 13 months, and Aquinas Audio Summa every 11 months. Most recently, Liber Pro was updated on October 23, 2026 and Aquinas Audio Summa on October 22, 2026.

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