St Paul Pro Cathedral vs St.Gall Algorithm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
St Paul Pro Cathedral
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The Cathedral is built in the Neo-Classical style and the spire, rising to over 60 metres is a Valletta landmark. The fine interior Corinthian columns balance the austere exterior and the imposing portico with its simple Ionic columns.
St.Gall Algorithm
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This app is intended exclusively for educational and training purposes. It is not a medical device and must not be used for clinical decision-making, patient assessment, or treatment planning under any circumstances. It does not constitute medical advice and is not intended for use with real patients. Explore the St. Gall treatment algorithm for proximal humerus fractures (PHF) as published by Spross et al. (J Bone Joint Surg. 103-A: 2021). This app visualizes the algorithm, letting you trace its decision pathways and understand the logic behind it. The app also includes the functional outcome model from Jacxsens et al. (J Shoulder Elbow Surg. 2025) and lets you practise measuring DTI, GTI, NSA and CSA on X-ray images to understand how these radiographic indices are defined and applied in the literature.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | St Paul Pro Cathedral | St.Gall Algorithm |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 14 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 35 MB | 26 MB |
| Age rating | 4+ | 17+ |
| Developer | Right Brain Ltd | HOCH Health Ostschweiz |
In-app purchases
St Paul Pro Cathedral
No in-app purchases
St.Gall Algorithm
No in-app purchases
Questions
Is St Paul Pro Cathedral free?
Is St.Gall Algorithm free?
Do St Paul Pro Cathedral or St.Gall Algorithm have ads?
Which is updated more often, St Paul Pro Cathedral or St.Gall Algorithm?
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