# InvoSurg vs ECMO Clinical Calculator

The clearest difference is rating: ECMO Clinical Calculator at 4.6 against InvoSurg's 4.3. ECMO Clinical Calculator also leads on iOS requirement (9.0 vs 14.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ECMO Clinical Calculator holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 12 and 10 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

InvoSurg ships an update every 10 months, ECMO Clinical Calculator every 14 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | InvoSurg | ECMO Clinical Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/invosurg/id1480250400/reviews) | **[4.6 (10 ratings)](https://appshunter.io/ios/app/ecmo-clinical-calculator/id1490929246/reviews)** |
| Number of ratings | **12** | 10 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 14 months |
| Monetization | Free | Free |
| Size | 22 MB | 10 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Invosurg Inc.](https://appshunter.io/developer/1480250399) | [Innovative ECMO Concepts Inc.](https://appshunter.io/developer/1642774023) |

## What reviewers say

### InvoSurg

[App page](https://appshunter.io/ios/app/invosurg/id1480250400)

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.

**Highlights:** Individualized care information, Delivered Oxygen (DO2) calculation, Educational event calendar, CPB and ECLS therapy information, Evidence-Based Guidelines reference, Cardiac surgery publications

**Features:** macOS Compatibility

**In-app purchases:** none


### ECMO Clinical Calculator

[App page](https://appshunter.io/ios/app/ecmo-clinical-calculator/id1490929246)

This app offers solutions for formulas frequently used in the care of Cardiopulmonary Bypass and ECMO/ECLS patients. It's a specialized tool for medical professionals.

**Highlights:** Cardiopulmonary Bypass formulas, ECMO/ECLS patient care calculations, Specialized medical tool, Designed for healthcare professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is InvoSurg free?

InvoSurg is free to download, with no in-app purchases.

### Is ECMO Clinical Calculator free?

ECMO Clinical Calculator is free to download, with no in-app purchases.

### Which has better reviews, InvoSurg or ECMO Clinical Calculator?

ECMO Clinical Calculator is rated higher. InvoSurg averages 4.3 out of 5 from 12 ratings, while ECMO Clinical Calculator averages 4.6 from 10 ratings.

### Do InvoSurg or ECMO Clinical Calculator have ads?

Neither InvoSurg nor ECMO Clinical Calculator shows ads.

### Which is updated more often, InvoSurg or ECMO Clinical Calculator?

InvoSurg ships an update every 10 months, and ECMO Clinical Calculator every 14 months. Most recently, InvoSurg was updated on October 26, 2026 and ECMO Clinical Calculator on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*