# EDTNA/ERCA vs PROTECT

The clearest difference is update cadence: EDTNA/ERCA at every 2 months against PROTECT's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

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

EDTNA/ERCA ships an update every 2 months, PROTECT every 6 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | EDTNA/ERCA | PROTECT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 21 MB | 39 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trilobite Technologies, s.r.o.](https://appshunter.io/developer/1106306899) | [NICST](https://appshunter.io/developer/1611317309) |

## What reviewers say

### EDTNA/ERCA

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

**Features:** macOS Compatibility

**In-app purchases:** none


### PROTECT

[App page](https://appshunter.io/ios/app/protect-icu/id1611317307)

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

**In-app purchases:** none


## Frequently asked questions

### Is EDTNA/ERCA free?

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

### Is PROTECT free?

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

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

Neither EDTNA/ERCA nor PROTECT shows ads.

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

EDTNA/ERCA ships an update every 2 months, and PROTECT every 6 months. Most recently, EDTNA/ERCA was updated on October 7, 2026 and PROTECT on October 7, 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.*