Stundenbuch by dicendum is an Android app that offers an authentic version of the "Great Book of Hours" and liturgical readings for the day. The app is designed to make praying the Book of Hours easy and accessible for everyone. In the past, praying the Book of Hours required practice and guidance, as the texts had to be searched for in books following specific rules. However, Stundenbuch simplifies this process by gathering all the texts for the day, including repetitions, and presenting them in one place.

The app's innovative one-finger operation makes praying easy and discreet, without requiring manual scrolling. Additionally, the app loads all texts for ten days in advance, allowing users to access them offline while traveling. The built-in "bell tower" reminder function notifies users daily to pray. Stundenbuch is an official publication of the German Liturgical Institute in cooperation with the Catholic Press Association. In summary, Stundenbuch is an excellent tool for those who want to pray the Book of Hours in a convenient and accessible way.