---
title: "Liber Pro — App Overview"
url: https://marlvel.ai/apps/liber-pro
category: Reference
developer: Anchoright Productions
platforms: ios, android
rating: 4.4 (8 ratings)
pricing: free
report_level: overview
generated: 2026-04-28
last_verified: "2026-04-28T09:51:55.788Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** While the app offers an invaluable, low-cost digital reference for the Liber Usualis, users report that the interface can be slow and the page-turning experience lacks the fluidity of a standard eBook reader.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Reference |
| Rating | 4.4 ★ (8) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 3.6.3 |
| Latest Version (Android) | 2.2.4 |
| Developer | Anchoright Productions |

<!-- SECTION: Summary -->
## What is Liber Pro?

Liber Pro provides a digital, indexed version of the 1961 Liber Usualis, offering over 2,300 pages of Gregorian Chant for iOS devices. The app integrates a dynamic liturgical calendar that automatically calculates moveable feasts and links directly to relevant chant pages. It is notable for digitizing a massive liturgical text while providing browser-like navigation and bookmarking capabilities.

<!-- SECTION: Key Features -->
## Key Features

- **1961 Liber Usualis Library**: Provides a complete digital archive of over 2,300 pages of Gregorian Chant.
- **Dynamic Liturgical Calendar**: Automatically calculates moveable feasts and links users directly to the corresponding proper, common, or feria pages.
- **Browser-like Navigation**: Includes back and forward buttons, touch-based zooming, and support for both portrait and landscape orientations.
- **User-Defined Bookmarks**: Allows users to save specific pages for quick retrieval during liturgical use.

<!-- SECTION: Target Audience -->
## Who is it for?

The app is designed for clergy, music students, and members of a schola who require access to traditional liturgical texts and Gregorian chant scores.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/liber-pro/id330876689?uo=4)
- [Google Play](https://play.google.com/store/apps/details?id=com.liber.app&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/liber-pro)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/liber-pro).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*