rtl_tcp SDR 4+

RTL-SDR Software Defined Radio

HotPaw Productions

    • 2.2 • 6 Ratings
    • $19.99



This is a macOS version of the iOS rtl_tcp SDR app.

- Connect, via the rtl_tcp network protocol, to an RTL-SDR USB port peripheral device.

- Listen to AM, FM, SSB and CW radio signals

- View an RF spectrum and waterfall

This app requires either a local or remote rtl_tcp server or similar raw IQ tcp server This app can connect to rtl_tcp for RTL-SDR devices, hfp_tcp for the Airspy HF+ and HF+ Discovery, rsp_tcp for SDRPlay RSP devices, and lmm_tcp for the LimeSDR Mini. Source code and build instructions for many of these servers is available from GitHub. This app can also connect to a Hermes Lite 2 QRP transceiver directly, or through an hl2_tcp server.

Note that no support is provided for building or installing any of these rtl_tcp or other tcp servers required to use this app either on your Mac, or on a Raspberry Pi or other remote server. Please see GitHub for repositories containing source code for various suitable rtl_tcp, hfp_tcp, or equivalent servers.

Please do not download this app unless you are already familiar with Software Defined Radio, have an RTL-SDR or equivalent SDR peripheral, and have already installed and tested rtl_tcp or work-alike on your Mac, Raspberry Pi, or other server. Note that this app requires a very high bandwidth network connection in order to receive streams of real-time RF samples from an rtl_tcp server.

What’s New

Version 1.5.2

Stability enhancements and Bug fixes (FM audio spectrum, SSB, noise reduction, and audio limiter)

Ratings and Reviews

2.2 out of 5
6 Ratings

6 Ratings

Candles Burn ,

to a remote or directly connected RTL-SDR USB

Does not work directly connected.

audioph1le ,

Decent, could use some UI refinements

To set this up, you need to have rtl_tcp installed on your Mac. You can get this with Homebrew.

This is just a front-end to rtl_tcp, running on a local or remote machine.

It's decent. I wish the tuning line would run down with waterfall. I wish when you moved the tuning range, the waterfall moved with it instead of resetting.

But it's OK. It works.

App Privacy

The developer, HotPaw Productions, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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