# St Paul Pro Cathedral vs St.Gall Algorithm

The clearest difference is update cadence: St.Gall Algorithm at every 3 weeks against St Paul Pro Cathedral's every 14 months. St Paul Pro Cathedral's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

St Paul Pro Cathedral ships an update every 14 months, St.Gall Algorithm every 3 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | St Paul Pro Cathedral | St.Gall Algorithm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Size | 35 MB | 26 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Right Brain Ltd](https://appshunter.io/developer/980253605) | [HOCH Health Ostschweiz](https://appshunter.io/developer/1378566484) |

## What reviewers say

### St Paul Pro Cathedral

[App page](https://appshunter.io/ios/app/st-paul-pro-cathedral/id1424125557)

**Features:** macOS Compatibility

**In-app purchases:** none


### St.Gall Algorithm

[App page](https://appshunter.io/ios/app/stgall-algorithm/id6766456299)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is St Paul Pro Cathedral free?

St Paul Pro Cathedral is free to download, with no in-app purchases.

### Is St.Gall Algorithm free?

St.Gall Algorithm is free to download, with no in-app purchases.

### Do St Paul Pro Cathedral or St.Gall Algorithm have ads?

Neither St Paul Pro Cathedral nor St.Gall Algorithm shows ads.

### Which is updated more often, St Paul Pro Cathedral or St.Gall Algorithm?

St Paul Pro Cathedral ships an update every 14 months, and St.Gall Algorithm every 3 weeks. Most recently, St Paul Pro Cathedral was updated on November 2, 2026 and St.Gall Algorithm on October 31, 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.*