# CCCSeries2 Catechism vs Calvin Opera

The clearest difference is price: CCCSeries2 Catechism at $1.99 against Calvin Opera's $15.99. CCCSeries2 Catechism also leads on rating (2.3 vs 1.0) and ratings volume (7 vs 1). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

CCCSeries2 Catechism costs $1.99 and Calvin Opera $15.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CCCSeries2 Catechism holds the better App Store score, 2.3 against 1.0. That said, the two scores are not equally well evidenced: CCCSeries2 Catechism has 7 ratings behind it against 1, so its average is the more settled of the two.

CCCSeries2 Catechism ships an update every 5 months, Calvin Opera every 9 months. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CCCSeries2 Catechism | Calvin Opera |
| --- | --- | --- |
| Price | **$1.99** | $15.99 |
| Rating | **[2.3 (7 ratings)](https://appshunter.io/ios/app/cccseries2-catechism/id570887136/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/calvin-opera/id1042943229/reviews) |
| Number of ratings | **7** | 1 |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Paid | Paid |
| Size | 25 MB | 1.6 GB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bil Kimes](https://appshunter.io/developer/504093998) | [jeong youngoh](https://appshunter.io/developer/429170564) |

## What reviewers say

### CCCSeries2 Catechism

[App page](https://appshunter.io/ios/app/cccseries2-catechism/id570887136)

Access the complete Catechism of the Catholic Church and all Vatican II documents directly from the Vatican website. This reference tool is organized for easy navigation through its four main sections: Beliefs, Sacraments, Morality, and Prayer.

**Highlights:** Complete Catechism of the Catholic Church, All Vatican II documents, Direct Vatican website links, Organized by topic, Smooth navigation, Summary of Second Vatican Council

**Features:** Vision Pro support

**In-app purchases:** none


### Calvin Opera

[App page](https://appshunter.io/ios/app/calvin-opera/id1042943229)

Access the complete writings of John Calvin with fast search capabilities and an integrated Latin dictionary. This comprehensive collection is a primary resource for studying Calvin's extensive theological works.

**Highlights:** Complete Works of John Calvin, Fast search functionality, Integrated Latin dictionary, Primary source for Calvin studies, Organized by volume and content type

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CCCSeries2 Catechism free?

CCCSeries2 Catechism costs $1.99, with no in-app purchases.

### Is Calvin Opera free?

Calvin Opera costs $15.99, with no in-app purchases.

### Which has better reviews, CCCSeries2 Catechism or Calvin Opera?

CCCSeries2 Catechism is rated higher. CCCSeries2 Catechism averages 2.3 out of 5 from 7 ratings, while Calvin Opera averages 1.0 from 1 ratings.

### Do CCCSeries2 Catechism or Calvin Opera have ads?

Neither CCCSeries2 Catechism nor Calvin Opera shows ads.

### Which is updated more often, CCCSeries2 Catechism or Calvin Opera?

CCCSeries2 Catechism ships an update every 5 months, and Calvin Opera every 9 months. Most recently, CCCSeries2 Catechism was updated on October 24, 2026 and Calvin Opera on October 7, 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.*