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Liber Pro

Liber Pro
  • #: 207034
  • Price: $14.99 In Apple Store
  • Category: Reference
  • Updated: 2015-09-11
  • Current Version: 2.0
  • 2.0
  • Size: 246.00 MB
  • Language: English
  • Seller: Drake Applications
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1 or later
  • © 2009 Drake Applications
  •  Add to Favorite apps



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 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.



- 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

- Auto-centering keeps content in view when paging

- Option to hide view selector for additional viewing area

- Selectable paging direction: up and down or left and right

- Selectable overlay eases page viewing


- 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


- 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


- Provides links to the 100 most recently visited pages this session

What's New in Version 2.0

Updated for iOS 8.
Added alternate feast to calendar view.
Added page border option.
Renders native PDF on all devices.
Fixed a few minor calendar inaccuracies.

NOTE: On some devices, zooming can be slow.

iPhone Screenshots

Liber Pro iPhone Screenshot 1
Liber Pro iPhone Screenshot 2

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The information may be outdated (2017-03-08 17:55:38). For actual information go to iTunes

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