In the play store it lists the free resources.
FREE RESOURCES INCLUDE:
The Catholic Lectionary, The Roman Catechism, Pictorial Lives of the Saints, Sources of Catholic Dogma (Denzinger), Thomas a Kempis’ The Imitation of Christ, Newman’s An Essay on the Development of Christian Doctrine, Chesterton’s Orthodoxy, and many more.
Free Bibles: The Douay-Rheims, King James Version, Clementine Vulgate, Novum Testamentum Graece (Tischendorf), The Greek New Testament: SBL Edition, Westcott-Hort Greek New Testament, Lexham English Bible.
What is the Roman Catechism and why don't I have it?