# Cairn Koans vs CCA

The clearest difference is update cadence: CCA at monthly against Cairn Koans's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Cairn Koans sells 4 one-off in-app purchases and CCA sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Cairn Koans ships an update every 2 months, CCA monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cairn Koans | CCA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 40 MB | 9 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Drew Douglass](https://appshunter.io/developer/1887999660) | [David Lai](https://appshunter.io/developer/1894961000) |

## What reviewers say

### Cairn Koans

[App page](https://appshunter.io/ios/app/cairn-koans/id6762514658)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Pebble | $1.99 | one-time |
| A Stone | $4.99 | one-time |
| A Standing Stone | $9.99 | one-time |
| A Cornerstone | $19.99 | one-time |


### CCA

[App page](https://appshunter.io/ios/app/cca-f-architect-study/id6788189859)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $2.99 | one-time |


## Frequently asked questions

### Is Cairn Koans free?

Cairn Koans is free to download, with in-app purchases available.

### Is CCA free?

CCA is free to download, with in-app purchases available.

### Do Cairn Koans or CCA have ads?

Neither Cairn Koans nor CCA shows ads.

### Which is updated more often, Cairn Koans or CCA?

Cairn Koans ships an update every 2 months, and CCA monthly. Most recently, Cairn Koans was updated on October 25, 2026 and CCA on October 24, 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.*