ChM Academy vs St.Gall Algorithm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ChM Academy
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Access to events organized by ChM sp. z o.o.
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: ChM Academy at daily against St.Gall Algorithm's every 3 weeks. St.Gall Algorithm's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price, ads and in-app purchases 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.
ChM Academy ships an update daily, St.Gall Algorithm every 3 weeks. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.
| Parameter | ChM Academy | St.Gall Algorithm |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 13.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 26 MB |
| Age rating | 4+ | 17+ |
| Developer | Jedrzej Serwik | HOCH Health Ostschweiz |
In-app purchases
ChM Academy
No in-app purchases
St.Gall Algorithm
No in-app purchases
Questions
Is ChM Academy free?
Is St.Gall Algorithm free?
Do ChM Academy or St.Gall Algorithm have ads?
Which is updated more often, ChM Academy or St.Gall Algorithm?
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