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

- Connect, via the rtl_tcp network protocol, to a remote or directly connected RTL-SDR USB peripheral

- 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.

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 1.3.9

New: Enhanced support for the new Macs and macOS operating system releases. Also a few minor bug squishes.

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

App Privacy

The developer, HotPaw Productions, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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