Liber Pro

Liber Pro

The Liber Usualis in your hand

8 ratings
14 reviews
Free

Details

  • Released
  • Updated
  • September 29, 2009
  • February 4, 2025

Features

Liber Pro screenshot #1 for iPhone
Liber Pro screenshot #2 for iPhone
Liber Pro screenshot #3 for iPhone
Liber Pro screenshot #4 for iPhone
Liber Pro screenshot #5 for iPhone
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About

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.

1961 Liber Usualis eBook
Dynamic liturgical calendar
User-defined bookmarks
Text-based search
Annotation tools
Browser-like navigation
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What's New in Liber Pro

3.6.3

February 4, 2025

Minor code updates.

User reviews

Great App!

Very useful and informative! I have really enjoyed using this app and would recommend this to others as well! Thanks to the developer for such great work!

Exactly what it needs to be - hi res on the new Retina display

Update - 2016-02-28

I hope this gets updated soon. It would be really nice if it took advantage of the new fluid layout methods of iOS 8 and later so that it could leverage the extra screen real estate of the iPad Pro.

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This app makes the Liber Usualis very approachable. Calendar integration is fantastic, especially for those trying to wade the then more eclectic rules regarding the structure of the pre-Vatican II Church year.

This is straight scan of the Liber, so don't expect it to behave like a traditional ebook. No text flow. You pan from column to column.

I have used this app for a while on the iPad2, but it looks fantastic on the Retina display of the new iPad. No update required to gain the extra resolution. Kudos the the developers for getting this right.

My only gripe is that the app can be persnickety when moving from page to page. It tries to "help" you go to the top of the next column, but it often feels more like a tug-of-war. It works much better, however, in portrait mode.
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An excellent update to a brilliant application

This update brings Liber Pro to full compatibility with iOS 8 and 9, and the larger iPhone screens. Thank you. There are also several welcome adjustments. On an iPhone 6 with iOS 8, the screen is now well used and makes it much more efficient for liturgical use. The zoom is indeed a bit quirky, but this is much less required than before on newer screens, as in landscape mode, the page is perfectly readable and accessible. Hopefully that can be fixed in a subsequent update. The combination of a reliable calendar with all the pages of the Liber Usualis is just brilliant.
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Amazing App

Can you imagine! The entire Liber Usualis fully indexed for this amazing price???!!!??!!!

Very appreciative of the effort, but...

Such great potential, but this falls short in terms of practical use. Yes, it's not an eBook as another review mentioned, but the pages don't have an adjustment where a single page cab be viewed. I chant in a schola, and not being able to see a complete page is rather limiting. In addition, the page "turning" is very slow to resolve. The next page "snaps" in place and ruins the flow. Think of this as the chant moves from one page to the next. Virtually unusable.

In addition, although there are bookmarks, the app is very slow. One has to access the "bookmark menu", press the desired bookmark, and then let the app think about it. By the time the screen finally resolves, the flow of following is ruined -- especially for the short variable parts such as the Introit.

This has great potential, but the slowness of the app and the lack of customization doesn't leave me with a positive experience. This would be a tough app to recommend.
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Developer apps

FAQ

What is Liber Pro?

Liber Pro is a digital application that provides the complete 1961 Liber Usualis, a book containing over 2,300 pages of Gregorian Chant. It includes features like a dynamic liturgical calendar, search functionality, and user-defined bookmarks.

What devices does Liber Pro support?

Liber Pro is available for iPhone and iPad devices.

Is Liber Pro free to use?

Yes, Liber Pro is available for free. It does not contain advertisements or require any in-app purchases.

How does the liturgical calendar in Liber Pro work?

The app includes a 1961 Roman Calendar that automatically calculates moveable feasts. You can select a date to view the proper, common, and feria for that day and instantly jump to the relevant pages in the Liber Usualis.

Can I make notes or annotations in Liber Pro?

Yes, Liber Pro offers annotation tools. For iPhone and iPod, there are drawing tools and color options. For iPad, it includes an additional highlighter tool and a wider color palette.

How often is Liber Pro updated?

The latest version of Liber Pro, 3.6.3, was last updated on February 4, 2025. Updates typically include improvements and new features.

What is the age rating for Liber Pro?

Liber Pro has an age rating of 4+, making it suitable for a wide range of users.

Does Liber Pro have a search function?

Yes, Liber Pro features a text-based search function that allows you to search the entire Liber Usualis content. Tapping a search result will take you directly to that page.