Heidelberg Catechism (RCUS)
by Andrew Dirks more by this developer →
#486,997 of 726,788 by ratings on Apple · #10,509 of 15,019 in Reference
First seen by this census 09/05/2026 — the store does not publish a creation date
Last updated 02/18/2026
Tracked since 09/05/2026
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Category: Reference
Description
The Heidelberg Catechism app provides three tabs to help you memorize all 129 questions and answers of the 2025 RCUS Modern English Edition of the Heidelberg Catechism:
1) Review Tab
Browse the complete catechism sequentially. Each question displays its full answer for reading and initial memorization. Mark questions as mastered to track your progress.
2) Practice Tab
Study questions one at a time with guided assistance. Filter the list by All, Mastered, or Unmastered questions, then tap any question to practice it. Use the Hint or Show Answer buttons to check your recall, and navigate to the previous or next question in your filtered set without returning to the list. Mark questions as mastered as you go.
3) Quiz Tab
Test your knowledge with randomly selected questions. Configure a question range to focus on a specific subset, or enable Only Include Mastered to quiz yourself exclusively on questions you've already marked as mastered. Use the Hint and Show Answer buttons to check your answer, and mark questions as mastered directly from the quiz.
Text of the Heidelberg Catechism copyrighted 2025 by RCUS. Used with Permission.
Icon background image by Aaron Burden.
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Growth
Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
| Per | Growth | Growth % | Actual change | Measured over |
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| day | Not enough history yet | |||
| week | 0 | — | 0 | 12.6 days |
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History
Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.