# RDAP Pro vs Echo

The clearest difference is review sentiment: Echo at 100% against RDAP Pro's 0%. Echo also leads on rating (5.0 vs 2.8) and in-app purchases (none vs 6). RDAP Pro's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. RDAP Pro sells 6 in-app purchases, starting at $9.99 per month. Echo asks for nothing beyond the download.

Echo holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: Echo has 30 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of RDAP Pro's written reviews are positive against 100% of Echo's.

RDAP Pro ships an update every 3 weeks, Echo every 9 days. The most recent releases landed on August 25, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | RDAP Pro | Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (4 ratings)](https://appshunter.io/ios/app/rdap-pro/id6751670889/reviews) | **[5.0 (30 ratings)](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390/reviews)** |
| Number of ratings | 4 | **30** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [RDAP Pro](https://appshunter.io/developer/6793686513) | [Mark Garrison Jr.](https://appshunter.io/developer/1877165041) |

## What reviewers say

### RDAP Pro

[App page](https://appshunter.io/ios/app/rdap-pro/id6751670889)

This app enables emergency response teams to communicate and coordinate effectively when traditional networks fail. It facilitates structural assessment, resource tracking, and casualty management, working entirely off-grid using mesh networking technology.

**Highlights:** Off-grid communication, Structural assessment and reporting, First responder coordination, Casualty and status tracking, Multi-jurisdictional management, Mesh networking technology

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Monthly Subscription | $9.99 | per month |
| Monitor Monthly Subscription | $19.99 | per month |
| Community Monthly Subscription | $29.99 | per month |
| Starter Annual Subscription | $89.99 | per year |
| Monitor Annual Subscription | $189.99 | per year |
| Community Annual Subscription | $289.99 | per year |


### 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:** none


## Frequently asked questions

### Is RDAP Pro free?

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

### Is Echo free?

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

### Which has better reviews, RDAP Pro or Echo?

Echo is rated higher. RDAP Pro averages 2.8 out of 5 from 4 ratings, while Echo averages 5.0 from 30 ratings.

### Do RDAP Pro or Echo have ads?

Neither RDAP Pro nor Echo shows ads.

### Which is updated more often, RDAP Pro or Echo?

RDAP Pro ships an update every 3 weeks, and Echo every 9 days. Most recently, RDAP Pro was updated on August 25, 2026 and Echo on September 17, 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.*