rtl_tcp SDR

rtl_tcp SDR

RTL-SDR Software Defined Radio

32 ratings
29 reviews
$19.99 $12.99

Lowest price: $9.99 a year ago (-30%)


Price history


Details

  • Released
  • Updated
  • May 2, 2018
  • January 21, 2026
rtl_tcp SDR screenshot #1 for iPhone
rtl_tcp SDR screenshot #2 for iPhone
rtl_tcp SDR screenshot #3 for iPhone
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About

This app acts as a software-defined radio receiver for iOS devices, allowing you to listen to various radio signals and view RF spectrum data. It connects to external SDR peripherals via a network protocol, requiring a separate server setup.

Listen to AM, FM, SSB, CW signals
View RF spectrum and waterfall
Connect to networked RTL-SDR peripherals
Supports Airspy HF+, SDRPlay, LimeSDR Mini
Direct connection to Hermes Lite 2
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What's New in rtl_tcp SDR

1.5.6

January 21, 2026

Stability enhancements and minor bug fixes for SSB modulation and CW decoding.

User reviews

Works well

I have an RTL-SDR blog v4 connected to a fedora 43 server that I’m running rtl_tcp on. This app is working really well on both my iPhone and iPad, connecting to rtl_tcp. Sounds great and was easy to connect. Would love to see the ability to save and scan channels in this app. Would also be awesome to be able to scan a frequency range.
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Solution for Hermes Lite or SDRPlay!

It isn’t perfect but it really cool to be able listen and even transmit using my Hermes Lite HF rig from anywhere! I think there’s a memory leak or some issue because after a few minutes and several transmissions it starts having issues. But I’m sure that will get fixed eventually.

Nice job!

Works great

Simple, basic remote sdr receiver/ controller- even has a built-in up converter setting. Waterfall looks good lots of different demodulation options. Highly recommend. It’s not some incredibly fancy software, but it does exactly what it says it does. Pretty amazing with apples limitations. Surprising how well it works no frills SDR receiver.
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It could be good in a certain way

Since there’s so many things that I need to do to actually make it work since you have to plug it into something by the way, I need extra ways for this to work and it’s pretty complicated and stuff so I need some extra things for it to work properly that you can go up to one gigahertz I think I’m trying to find the perfect SDR that doesn’t require such complicated stuff like plugging it in
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Great little app!!

I use this to connect to a pi with SDR I have across the yard on top of my outbuilding, fiber backbone connects that building to my home network. It works like a champ! I can sit on the couch with my iPad or phone and listen or sniff out noise away from the radio room… thanks!

Developer apps

FAQ

What does this app do?

This app functions as a software-defined radio receiver for iOS devices. It allows you to tune into various radio signals like AM, FM, SSB, and CW, and visualize the radio frequency spectrum and waterfall displays. It connects to external SDR hardware through a network protocol.

How do I connect an SDR peripheral to this app?

This app requires an external rtl_tcp server to connect to USB SDR peripherals. iOS devices cannot directly connect USB devices. You need to set up a server, such as a Raspberry Pi or Mac, with the SDR plugged in and running the rtl_tcp protocol, accessible over your network.

What are the costs associated with using this app?

The app itself is a paid application. However, it requires an external SDR peripheral and a separate server setup, which may incur additional hardware and software costs depending on your existing equipment and chosen server solution.

What devices is this app compatible with?

This app is designed for iOS devices. It can connect to various SDR peripherals like RTL-SDR, Airspy HF+, SDRPlay devices, LimeSDR Mini, and Hermes Lite 2, provided they are connected to a compatible network server.

What are the typical use cases for this app?

This app is ideal for radio enthusiasts and hobbyists interested in exploring radio frequencies. It can be used for listening to shortwave broadcasts, amateur radio communications, monitoring radio spectrum activity, and learning about radio signal analysis.