# Heidelberg Catechism (RCUS) vs Reformed Reader Plus

The clearest difference is update cadence: Reformed Reader Plus at every 4 months against Heidelberg Catechism (RCUS)'s every 38 months. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Heidelberg Catechism (RCUS) against 5.0 for Reformed Reader Plus. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Heidelberg Catechism (RCUS) ships an update every 38 months, Reformed Reader Plus every 4 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Heidelberg Catechism (RCUS) | Reformed Reader Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/heidelberg-catechism-rcus/id1443296306/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/reformed-reader-plus/id6511201071/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 4 MB | 32 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Dirks](https://appshunter.io/developer/1443296305) | [Kenneth Brown](https://appshunter.io/developer/1755460753) |

## What reviewers say

### Heidelberg Catechism (RCUS)

[App page](https://appshunter.io/ios/app/heidelberg-catechism-rcus/id1443296306)

This app aids in memorizing the Heidelberg Catechism with three distinct study modes. Track your progress, practice questions individually, and test your knowledge with customizable quizzes. It offers a structured approach to learning the 129 questions and answers.

**Highlights:** Sequential review of all questions and answers, Mark questions as mastered, Practice questions individually with hints, Filter questions by mastered/unmastered, Randomized quizzes with customizable ranges, Quiz exclusively on mastered questions

**In-app purchases:** none


### Reformed Reader Plus

[App page](https://appshunter.io/ios/app/reformed-reader-plus/id6511201071)

Explore the core tenets of Reformed theology with a curated library of confessions and catechisms. Features include easy navigation, scripture proofs, memory functions, and advanced search capabilities for in-depth study.

**Highlights:** Curated Reformed confessions and catechisms, Easy navigation and intuitive interface, Scripture proofs for theological doctrines, Memory features for saving favorite sections, Advanced search for themes and doctrines

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Heidelberg Catechism (RCUS) free?

Heidelberg Catechism (RCUS) is free to download, with no in-app purchases.

### Is Reformed Reader Plus free?

Reformed Reader Plus is free to download, with no in-app purchases.

### Which has better reviews, Heidelberg Catechism (RCUS) or Reformed Reader Plus?

Heidelberg Catechism (RCUS) and Reformed Reader Plus are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Heidelberg Catechism (RCUS) or Reformed Reader Plus have ads?

Neither Heidelberg Catechism (RCUS) nor Reformed Reader Plus shows ads.

### Which is updated more often, Heidelberg Catechism (RCUS) or Reformed Reader Plus?

Heidelberg Catechism (RCUS) ships an update every 38 months, and Reformed Reader Plus every 4 months. Most recently, Heidelberg Catechism (RCUS) was updated on November 2, 2026 and Reformed Reader Plus on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*