Echo: Global SDR Receiver

Echo: Global SDR Receiver

SDR Tuner, Shortwave & Scanner

33 ratings
18 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 31, 2026
  • September 29, 2026

Features

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About

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.

✓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
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What's New in Echo

1.5.2

September 29, 2026

Echo 1.5 introduces Echo Pro, along with new ways to capture, understand, and revisit the airwaves. • Record live radio and build your own recording library
• Transcribe live broadcasts on device as you listen
• Translate supported transcriptions into English
• Sync recordings, transcripts, translations, notes, favorites, saved servers, and supported settings across your Apple devices with iCloud
• Access and play your synced recordings across devices
• Improved accessibility and VoiceOver support throughout Echo New in 1.5.2:
• Use Echo Pro recording and live transcription while listening through Direct Server
• Streamlined recording sharing with simple options for sharing the recording or its text
• Improved recording favorites for quickly marking recordings you want to return to
• Additional fixes, refinements, and performance improvements Everything you already use Echo for remains free. Listening, tuning, the global map, scanning, frequency search, and connecting to supported servers do not require an Echo Pro subscription. Echo Pro features require a monthly or annual subscription.

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Subscriptions & In-App Purchases

Echo Pro Monthly

Full Echo Pro access, billed monthly.

$4.991 Month
How to cancel Echo subscription ⁉️

User reviews

Thank you!

Thank you so much, Mark! I haven’t been able to find a place for my rig in over 25 years. This has given me the push that I need to get it going again. In the meantime, I’ll be using Echo!

Excellent tool for listening!

When I was first studying for my ham radio license a couple years ago, I discovered the joy of Web SDR and all that it allowed me to listen to and learn from. In many ways, it is very similar to scanning through a short wave radio, and pulling up stations from around the world.

But the web application struggled on mobile browsers, and it was always a bit of a ramshackle experience.

Echo has found a way to make this tool available, user-friendly, and dead simple for iPhone users. It is greatly increased my enjoyment of listening in, and meant I don’t have to be at my laptop to really get the full experience. Thank you so much! Keep up the good work!
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Thank-you!

Thank-you for creating! Amazing. Can’t wait for further updates. Expanded favorites functionality would be nice.

Excellent

Thank you. iOS has been needing an app like those for way too long!

Function and interface are flawless and easy to navigate so far for me. Primary use is amateur radio.

I can finally leave the app playing in the background without worrying about my screen timing out, and I can navigate to other phone or tablet functions like email while still listening.

I originally used during work travel for listening to a net that I frequent back home. I quickly realized this app is great for listening to so much more.

5 stars all day long. Thank you!!
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It’s amazing!

As a pure novice to the ham & shortwave radio realm finding this app is like winning the lottery. So much to learn and explore. If the developer ever puts out a link to a YouTube tutorial I’d be even more thrilled.

FAQ

What can I listen to with Echo?

Echo allows you to tune into a wide variety of radio signals from around the world. This includes international shortwave broadcasts, aviation communications, numbers stations, and distant FM stations, all accessible through community-hosted Software Defined Radio (SDR) receivers.

How does Echo's interactive map work?

The app features a global interactive map that uses a native clustering engine to visually display thousands of remote SDR servers worldwide. You can easily browse these receivers or instantly search for specific ones by name or location.

What SDR architectures does Echo support?

Echo offers unmatched SDR compatibility, seamlessly supporting KiwiSDR, OpenWebRX, WebSDR, and FM-DX architectures. You can also add your own unlisted servers with custom URL entry if needed.

Can I listen to Echo in the background?

Yes, Echo provides uninterrupted background audio. It features a custom audio bridge that intercepts complex SDR streams, allowing for true iOS background playback and lock-screen controls, even when your screen is locked or you are using other apps.

Does Echo have ads?

No, Echo is ad-free. The application is built with a privacy-first approach and does not include any advertisements.

Is Echo available on Android devices?

Echo is natively built for iOS devices. It is currently supported on iPhone and iPad.

How often is Echo updated?

Echo was last updated on March 31, 2026, with version 1.0. The app is designed for speed, aesthetics, and privacy, ensuring a premium listening experience.

What is the age rating for Echo?

Echo has an age rating of 4+. This indicates it is suitable for a wide audience and does not contain content inappropriate for younger users.