Shajara Katoliki Offline is a free Android application developed by Veblen Investment that provides users with access to Catholic teachings, scriptures, and celebrations for each day of the week, including Sundays and Dominica. The app also includes chants, hymns, and prayers for various occasions, such as the Sunday/Dominica liturgy. It also displays liturgical colors for each day of the year, along with the vestments and altar cloths used during Mass, as well as the name of the saint or saints being celebrated that day.

The app is a great resource for Catholic students and scholars who want to deepen their knowledge of Catholicism. It is also useful for priests, deacons, and other members of the clergy who want to stay up-to-date with the liturgical calendar and teachings of the Church. The app's offline mode ensures that users can access its content even without an internet connection, making it ideal for use in areas with limited internet access.