An antique-style engraving of Christ standing among the apostles, teaching.

CatechismofSaint
Pius X

Master concise and accurate answers to the essential questions posed in the Catechism of Saint Pius X.

Join the TestFlight

Coming soon for iPhone & iPad

959 questions. One enduring faith.

Designed for recall

Know the answer.
Say it in your own words.

Read each question, listen to the traditional answer, then recall its meaning aloud. SPXC keeps practice focused and shows you where to return next.

The Commandments of God in General chapter in SPXC, with its catechism questions and answers.
Study by topicRead the Commandments of God in General in their original structure, then practice the chapter when you are ready.
SPXC practice screen scoring a word-for-word answer to What is the 3rd commandment of God's law? at 100 percent.
Grow with every answerGet credit for the meaning you know, then use each score to move closer to word-for-word precision.
SPXC review mode comparing practiced answers with the catechism answers and their scores.
Review your answersCompare what you said with the catechism, see each score, and return to the answers that need more work.

Intelligent semantic review

SPXC rewards you for reaching the heart of an answer, then encourages you toward its full precision. TypeSafe’s Jev quickly scores how closely your answer carries the intended meaning, so a faithful paraphrase earns credit while the 100% word-for-word answer remains the goal.

Each score marks a real step in learning: grasp the essential meaning, strengthen what is missing, and keep practicing until the complete answer comes naturally.

Example question What is Faith?
  1. Exact wording100%

    “Faith is a supernatural virtue, which God infuses into our souls, and by which, relying on the authority of God Himself, we believe everything which He has revealed and which through His Church He proposes for our belief.”

  2. Complete meaning96%

    “God gives us faith as a supernatural virtue; through it we believe what he reveals and teaches through the Church.”

  3. Essential meaning86%

    “Faith is the virtue God gives us so we can believe what he has revealed.”

  4. Growing precision76%

    “Faith is a supernatural virtue placed in us by God.”

  5. Keep learning34%

    “Faith means believing strongly in something.”

Illustrative scores show a path from first understanding to complete, word-for-word recall.

Coming soon

learn the faith by heart.

For iPhone and iPad · iOS 26 or later