If you are looking to , you are searching for the Liturgy of the Hours (also known as the Divine Office or Breviary ). This ancient form of prayer structures the day through the recitation of psalms, hymns, and scripture.
While the physical "four-volume set" is the traditional standard, digital downloads and apps have become the most common way for laypeople and clergy to access these prayers on the go.
Most modern users prefer mobile applications because they automatically handle "ribbon placement"—the complex task of finding the correct psalms and readings for each specific day. Divine Office - Liturgy of the Hours