Vox Petri
Explore the Papal Encyclicals
Free · Designed for iPad. Not verified for macOS.
Vox Petri brings 145 years of papal encyclicals to your fingertips. Read the complete texts of 221 encyclicals from Leo XIII through Leo XIV, explore thematic connections across centuries of Church teaching, and visualize the web of citations linking documents together.
Features include a full-text reader with paragraph-level bookmarks, 20 thematic threads tracing ideas like Human Dignity, Social Justice, and Faith & Reason across the tradition, and an interactive connection graph showing how encyclicals cite and build on each other.
Future releases may include full text search and the ability to get answers to questions via large language model integrations to the encyclical corpus.
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- Optimized memory / disk usage: removed app data to make app size smaller
- UX fixes and optimizations
The developer, Jonathan Liang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- Jonathan Liang
- Size
- 89.5 MB
- Category
- Reference
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jonathan Liang