Breviarium Meum is an iPhone application designed for users who wish to engage with the traditional Latin breviary of the Catholic Church. This app allows users to access the texts of the breviary even without a network connection, as it enables downloading of prayers up to a week in advance. It includes a variety of translations, such as English, French, and Spanish, along with a collection of Latin prayers and blessings. Users can also customize their experience by selecting preferred background colors and text sizes.

The app serves as a modern tool for praying the Roman Liturgy in its Usus Antiquior form, which is acknowledged for its historical significance. It is important to note that while the app provides a rich resource for prayer, some translations, particularly Danish and Portuguese, are incomplete, and users may encounter English translations for sections not available in their selected language.