“DoCat” is a follow-up to the popular YouCat (Youth Catechism of the Catholic Church) from World Youth Day 2011.
The book which teaches the basics of Catholic social teaching is a gift from Pope Francis to all of the participants of World Youth Day in Krakow, Poland and extended to those participating from afar.
When you download the DoCat app you may add the DoCat book content into the app without charge until the close of World Youth Day on July 31, 2016.
Here Pope Francis explains it:
And another video just for fun: