i vs Valve PPM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i
This medical app assists clinical perfusionists and students with cardiac surgery calculations. It offers tools for patient volume, flow rates, drug information, and quizzes. Access common equations and perfusion news within the app.
- Adult and Pediatric Calculators
- SVR and PVR Calculator
- Oxygen Delivery and Consumption Calculator
- Pediatric Cannula Recommendations
- Searchable Drug Database
- Multiple Choice Quiz
- Common Equations and Normal Values
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The i-Perfuse mobile application is designed for clinical perfusionists, students and individuals who work in the realm of cardiac surgery. Features Include: -Adult and Pediatric Calculator (BSA, BMI, Patient Volume, Plasma Volume, Total Volume, HCT on CPB, Flow Rates) -SVR and PVR Calculator -Oxygen Delivery and Consumption Calculator -Pediatric Cannula Recommendations based on previous case experiences at our institution along with pressure/flow relationships -Searchable Drug Database with commonly used drugs that perfusionists are exposed to (Category, Description, Mechanism of Action, Site of Action, Cardiovascular Indications) -Multiple Choice Quiz -Common Equations and Normal Values -Perfusion News Feed
Valve PPM
This tool assists medical professionals in assessing implanted prosthetic cardiac valves. It offers guidance for checking existing valve function and selecting the optimal valve before implantation based on patient and prosthesis parameters.
- Assess implanted valve function
- Select optimal valve before implantation
- Analyze patient and prosthesis parameters
- Identify potential patient-prosthesis mismatch
- Determine intrinsic prosthesis dysfunction
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Valve PPM is an innovative mobile tool developed to support echocardiography professionals in their effort of assessing the functionality of implanted prosthetic cardiac valves. The application provides guidelines for assessing an already implanted valve (Check Valve Function) and for choosing a valve before implantation (Optimal Valve Selector). The algorithms behind the App have been derived after an extensive research of the published materials on the aortic and mitral prosthetic valve assessment. - Check Valve Function After selecting a particular valve type, the patient characteristics (weight/height) and the prosthesis actual parameters (peak velocity, mean gradient, VTI prosthesis, VTI LVOT and LVOTd), Valve PPM will provide the user with an answer regarding the normal function of the valve, the potential patient prosthesis mismatch or the intrinsic prosthesis dysfunction. - Optimal Valve Selector The user will be required to select a valve position (aortic/mitral) and the patient characteristics (weight/height) and Valve PPM will instantly indicate the minimum Effective Orifice Area (EOA) in order to avoid Patient Prosthesis Mismatch (PPM).
Screenshots
Verdict
The clearest difference is review sentiment: Valve PPM at 100% against i's 0%. Valve PPM also leads on rating (5.0 vs 3.4). i's advantage is iOS requirement (10.0 vs 15.1). On price, ratings volume, update cadence and ads 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.
Valve PPM holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews point the same way: 0% of i's written reviews are positive against 100% of Valve PPM's.
i ships an update every 4 months, Valve PPM every 2 months. The most recent releases landed on September 21, 2026 and October 8, 2026 respectively.
| Parameter | i | Valve PPM |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (7 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 3 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 31 MB | 37 MB |
| Age rating | 12+ | 12+ |
| Developer | Courtland Menke | KRUTSCH |
Customer experience
i
Valve PPM
In-app purchases
i
No in-app purchases
Valve PPM
No in-app purchases









