Katolički molitvenik is an Android application developed by VITK under the category of Education & Reference and subcategory of Books. The app is available for free and provides a comprehensive Catholic calendar with a prayer book, saint list, and an option to add reminders. The app has recently been updated to version 3.0.0, which includes new features such as a link to the Bible, link to Časoslov, categorized prayers, search functionality for prayers, and songs in the prayer book.

Furthermore, the app also includes a list of all official holidays in the Republic of Croatia for the current and next year. The app also allows users to share the app with others. The app is intuitive and easy to navigate, and the update process is streamlined without requiring the installation of a new version. The app also includes a comments section for users to provide feedback and suggestions. Overall, Katolički molitvenik is a useful tool for Catholics in Croatia and provides a convenient way to keep track of important dates and prayers.