i vs InvoSurg
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
InvoSurg
This medical app assists cardiac surgery clinicians by providing access to individualized care information, calculations for delivered oxygen during cardiopulmonary bypass, and a repository of educational events and publications. It serves as a convenient mobile reference for CPB and Extra Corporeal Life Support therapies, along with evidence-based guidelines.
- Individualized care information
- Delivered Oxygen (DO2) calculation
- Educational event calendar
- CPB and ECLS therapy information
- Evidence-Based Guidelines reference
- Cardiac surgery publications
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The InvoApp mobile application is designed for clinicians working in cardiac surgery. With InvoApp you can: - View individualized care information - Calculate Delivered Oxygen (DO2) during cardiopulmonary bypass (CPB) - Access the calendar of educational events - Access information on CPB and Extra Corporeal Life Support therapies - Reference Evidence-Based Guidelines - Review contemporary cardiac surgery and perfusion publications The InvoApp is designed to provide useful tools for clinicians, compiled together with the convenience of mobile technology.
Screenshots
Verdict
The clearest difference is review sentiment: InvoSurg at 100% against i's 0%. InvoSurg also leads on rating (4.3 vs 3.4). i's advantage is update cadence (every 4 months vs every 10 months) and device support (4 vs 2). On price, ratings volume, 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.
InvoSurg holds the better App Store score, 4.3 against 3.4. Both are backed by a comparable volume of ratings — 7 and 11 respectively. Written reviews point the same way: 0% of i's written reviews are positive against 100% of InvoSurg's.
i ships an update every 4 months, InvoSurg every 10 months. The most recent releases landed on September 21, 2026 and October 12, 2026 respectively.
| Parameter | i | InvoSurg |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (7 ratings) | 4.3 (11 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 | 11 — better |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 31 MB | 22 MB |
| Age rating | 12+ | 17+ |
| Developer | Courtland Menke | Invosurg Inc. |
Customer experience
i
InvoSurg
In-app purchases
i
No in-app purchases
InvoSurg
No in-app purchases
