# ISDR Test vs Echo

The clearest difference is in-app purchases: ISDR Test at none against Echo's 2. ISDR Test also leads on iOS requirement (11.2 vs 17.0). Echo's advantage is device support. On price there is nothing between them.

Both are free to download. Echo sells 2 in-app purchases, starting at $4.99 per month. ISDR Test asks for nothing beyond the download.

## The numbers

| Metric | ISDR Test | Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (35 ratings)](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390/reviews)** |
| Number of ratings | — | **35** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 9 days |
| Monetization | — | Free |
| Size | 13 MB | 12 MB |
| Requires iOS | **11.2** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Artur Rybak](https://appshunter.io/developer/1062686853) | [Mark Garrison Jr.](https://appshunter.io/developer/1877165041) |

## What reviewers say

### ISDR Test

[App page](https://appshunter.io/ios/app/isdr-test/id1366658157)

**In-app purchases:** none


### Echo

[App page](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390)

Tune into thousands of remote radio servers worldwide from your iPhone or iPad. Explore shortwave broadcasts, aviation communications, and more with a global interactive map and advanced tuning features. Enjoy uninterrupted background audio and a privacy-first experience.

**Highlights:** Global interactive map and search, Support for multiple SDR architectures, Scanner mode and OpenMHz archives, Pro-level tuning and analytics, Offline frequency library and logging, Uninterrupted background audio, Privacy-first design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro Monthly | $4.99 | per month |
| Echo Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is ISDR Test free?

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

### Is Echo free?

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

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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.*