POTTER vs Behind the Knife
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
POTTER
This medical tool provides an accurate and user-friendly way to calculate emergency surgery risks. It's based on a machine learning algorithm derived from extensive research.
- Emergency surgery risk calculation
- Machine learning algorithm
- User-friendly interface
- Based on published research
- Highly accurate
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POTTER is a highly accurate and user-friendly emergency surgery risk calculator developed by George Velmahos (MD, PhD), Haytham Kaafarani (MD, MPH), Dimitris Bertsimas (PhD), and Jack Dunn (PhD). This Machine Learning Algorithm is the digital manifestation of the research found in the October 2018 Annals of Surgery publication, “Surgical Risk Is Not Linear: Derivation and Validation of a Novel, User-friendly, and Machine Learning-based Predictive OpTimal Trees in Emergency Surgery Risk (POTTER) Calculator.”
Behind the Knife
This platform offers surgical education with high-yield topics and interviews with field leaders. It provides timely, relevant, and engaging content to help users succeed in their medical studies and careers.
- Surgical education platform
- High-yield educational topics
- Interviews with field leaders
- Timely and relevant content
- Engaging learning experience
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Behind the Knife is the world’s #1 surgical education platform. From high-yield educational topics to interviews with leaders in the field, Behind the Knife delivers the information you need to know. Enjoy timely, relevant, and engaging content designed to help you DOMINATE THE DAY!
Screenshots
Verdict
The clearest difference is rating: POTTER at 4.4 against Behind the Knife's 4.0. POTTER also leads on iOS requirement (11.2 vs 15.0). Behind the Knife's advantage is update cadence (every 5 weeks vs every 8 months) and review sentiment (58% vs 50%). On price, ads, in-app purchases and monetization model 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.
POTTER holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 5 and 19 respectively. Written reviews complicate that: 50% of POTTER's written reviews are positive against 58% of Behind the Knife's, so the app with the better star average is not the one people write more warmly about.
POTTER ships an update every 8 months, Behind the Knife every 5 weeks. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.
| Parameter | POTTER | Behind the Knife |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) — better | 4.0 (19 ratings) |
| Positive reviews | 50.0% of reviews | 58.3% of reviews — better |
| Number of ratings | 5 | 19 — better |
| Update frequency | Every 8 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 168 MB |
| Age rating | 4+ | 17+ |
| Developer | Interpretable AI LLC | Behind the Knife |
Customer experience
POTTER
Behind the Knife
In-app purchases
POTTER
No in-app purchases
Behind the Knife
No in-app purchases
