Discover a collection of treasured catechisms in one convenient volume, featuring the Westminster Shorter & Larger, Children's, Heidelberg, and Geneva Catechisms. Each catechism is filled with thought-provoking questions and comprehensive answers, accompanied by Scripture proofs in both KJV and ESV translations. What sets this collection apart is the innovative feature to hide the answers, making it easier for readers to commit the catechisms to memory. This is an invaluable resource for individuals and families seeking a deeper understanding of their faith and a practical tool for memorizing and meditating on the foundational beliefs of Christianity.

catechism.app is a small free app that puts four Protestant catechisms in one place — the Westminster Shorter, the Westminster Larger, the Children's Catechism (also from the Westminster tradition), the Heidelberg Catechism, and the Geneva Catechism.

Each catechism is laid out as a list of questions and answers, with Scripture proofs in both the KJV and the ESV. The signature feature is a tap-to-hide control on each answer, so you can quiz yourself or have a child quiz a parent. You can bookmark a question and jump back to it later.

What's done well is the memorization angle. Reformed families have used these catechisms with their kids for generations, and the hide-the-answer trick maps onto that practice directly. The interface is clean and quiet — no notifications, no ads.

Useful in a Presbyterian, Reformed, or Reformed Baptist home for catechizing children, or for a seminarian who needs to keep these on hand for class. Also useful for Catholics studying historical theology — these are the texts the Reformers wrote to teach their own people, and they're worth reading if you want to understand the divide.

This is the part to be clear about: none of these are Catholic. The Westminster, Heidelberg, and Geneva catechisms come out of the Reformed tradition and openly contradict Catholic teaching on the Mass, the saints, Mary, the papacy, and much else. If you're looking for the Catechism of the Catholic Church or the Baltimore Catechism, this isn't the app — try Magisterium, Verbum, or one of the YOUCAT apps.

Free, by Deo Volente, LLC. Available on the App Store: catechism.app. A well-made app for a specific Reformed audience, useful to Catholics mostly as a study reference.