There's one question + answer per week. memorize the corresponding question to the week (e.g. Jan 1-7: Q1).
An abbreviated version of the adult answer has been made for children. In the book it's the highlighted portion. On the app toggle Kids Answer on in settings
The full answer is designed to be memorized by adults along with the scripture reference
There's a beautiful and simple app for the catechism that makes it available wherever you find yourself! Download here
The bread and butter is the New City Catechism. Purchase it here.
Go one step further with the New City Catechism Devotional. Purchase it here.