# STEMIcathAID vs Echo Calculate

The clearest difference is in-app purchases: STEMIcathAID at none against Echo Calculate's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Echo Calculate sells 1 one-off in-app purchase. STEMIcathAID asks for nothing beyond the download.

STEMIcathAID ships an update every 3 months, Echo Calculate every 6 months. The most recent releases landed on August 28, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | STEMIcathAID | Echo Calculate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/stemicathaid/id1482930279/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free | — |
| Size | 71 MB | 26 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Icahn School of Medicine at Mount Sinai](https://appshunter.io/developer/972625667) | [Gundogan Emre](https://appshunter.io/developer/1651146056) |

## What reviewers say

### STEMIcathAID

[App page](https://appshunter.io/ios/app/stemicathaid/id1482930279)

This medical app streamlines STEMI treatment by optimizing patient recognition, response, and record-keeping. It enhances communication and coordination among healthcare providers, reducing critical time to reperfusion for high-risk patients. Features include EKG upload, cardiogenic shock assessment, and live GPS tracking.

**Highlights:** EKG upload via smartphone, Cardiogenic shock assessment, STEMI patient transfer pathway, Live GPS tracking of EMS, HIPAA compliant encrypted collaboration, Notification system for cath lab preparation

**Features:** Vision Pro support

**In-app purchases:** none


### Echo Calculate

[App page](https://appshunter.io/ios/app/echo-calculate/id1660468437)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Calculate Premium | $3.99 | one-time |


## Frequently asked questions

### Is STEMIcathAID free?

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

### Is Echo Calculate free?

Echo Calculate is free to download, with in-app purchases available.

### Do STEMIcathAID or Echo Calculate have ads?

Neither STEMIcathAID nor Echo Calculate shows ads.

### Which is updated more often, STEMIcathAID or Echo Calculate?

STEMIcathAID ships an update every 3 months, and Echo Calculate every 6 months. Most recently, STEMIcathAID was updated on August 28, 2026 and Echo Calculate on September 16, 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.*