# ECMO Clinical Calculator vs Coltrain

The clearest difference is update cadence: Coltrain at monthly against ECMO Clinical Calculator's every 14 months. Coltrain also leads on rating (5.0 vs 4.6). ECMO Clinical Calculator's advantage is iOS requirement (9.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Coltrain holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 10 and 17 respectively.

ECMO Clinical Calculator ships an update every 14 months, Coltrain monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | ECMO Clinical Calculator | Coltrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/ecmo-clinical-calculator/id1490929246/reviews) | **[5.0 (17 ratings)](https://appshunter.io/ios/app/coltrain/id1491315335/reviews)** |
| Number of ratings | 10 | **17** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Monthly** |
| Monetization | Free | Free |
| Size | 10 MB | 305 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Innovative ECMO Concepts Inc.](https://appshunter.io/developer/1642774023) | [Cognition Med, LLC](https://appshunter.io/developer/1491315334) |

## What reviewers say

### 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


### Coltrain

[App page](https://appshunter.io/ios/app/coltrain/id1491315335)

A secure, cloud-based messaging platform for healthcare professionals to enhance patient care and collaboration. It allows for case-based discussions and the secure sharing of photos, videos, and documents.

**Highlights:** HIPAA-compliant messaging, Secure cloud-based platform, Case-based discussions, Photo and document sharing, Peer-to-peer communication, Mobile device compatibility

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ECMO Clinical Calculator free?

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

### Is Coltrain free?

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

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

Coltrain is rated higher. ECMO Clinical Calculator averages 4.6 out of 5 from 10 ratings, while Coltrain averages 5.0 from 17 ratings.

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

Neither ECMO Clinical Calculator nor Coltrain shows ads.

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

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

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