# EDTNA/ERCA vs EchoMastery

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

Both are free to download. EchoMastery sells 1 in-app purchase, starting at $6.99 per month. EDTNA/ERCA asks for nothing beyond the download.

EDTNA/ERCA ships an update every 2 months, EchoMastery monthly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | EDTNA/ERCA | EchoMastery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 21 MB | 9 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Trilobite Technologies, s.r.o.](https://appshunter.io/developer/1106306899) | [Christian Kirsch](https://appshunter.io/developer/1848333293) |

## What reviewers say

### EDTNA/ERCA

[App page](https://appshunter.io/ios/app/edtnaerca/id1531289859)

**Features:** macOS Compatibility

**In-app purchases:** none


### EchoMastery

[App page](https://appshunter.io/ios/app/echomastery-echocardiography/id6764770740)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EchoMastery Pro Access | $6.99 | per month |


## Frequently asked questions

### Is EDTNA/ERCA free?

EDTNA/ERCA is free to download, with no in-app purchases.

### Is EchoMastery free?

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

### Do EDTNA/ERCA or EchoMastery have ads?

Neither EDTNA/ERCA nor EchoMastery shows ads.

### Which is updated more often, EDTNA/ERCA or EchoMastery?

EDTNA/ERCA ships an update every 2 months, and EchoMastery monthly. Most recently, EDTNA/ERCA was updated on November 7, 2026 and EchoMastery on October 31, 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.*