SmartSDR™ FlexRadio Systems‪®‬ 4+

Official SDR Client

Marcus Roskosch

    • 4.9 • 41 Ratings
    • $149.99



This App works with any FlexRadio firmware 1,2 or 3, including version 3.4.x

Official FlexRadio Systems® Client for your Mac

SmartSDR is a full featured FlexRadio client that enables your Mac to operate your FlexRadio device.

It is fully compatible to SmartSDR v1, v2 (including SmartLink) and v3 (including MultiFlex and SmartControl).

Important: This App requires a FlexRadio Systems® Series-6000 Software Defined Radio (SDR).


■ Compatible to macOS Big Sur and Monterey and newer

■ Runs natively on M1 Silicon as well as Intel Macs

SmartSDR offers all features of SmartSDR for Windows such as:

■ Unlimited number of Slices, Panadapters (limited only by Radio model)

■ Maintain all Radio, Slice and Panadapter settings

■ SmartLink™ remote access support

■ MultiFlex™ support

■ SmartControl™ support

■ Native Power Genius (PGXL), Tuner Genius (TGXL), Antenna Genius (AGXL) and Rotator Genius (RGXL) Support (no Windows Software needed)

■ And all the other features of the Windows Version (including Diversity)

There is no longer need for running SmartSDR for Windows on Bootcamp, Parallels or a separate PC because these features are also included:

■ Radio Firmware Updates

■ Setting up and registering SmartLink - you can even maintain multiple SmartLink accounts

■ Installation of Region (Turf) Files

■ Backup / Restore Radio Configuration and Memories

In addition, the following extra features are included:

■ Full featured FT8 / FT4 Tool

■ RTTY now also included

■ CW Decoder (new)

■ Logbook with auto logging and ADIF Im- and UDP Export (Synchronizes with Smartsdr for iOS over iCloud) and LOTW, integration

■ DX-Cluster Tool

■ Band Plan

■ Voice Macros (Voice keyer)

■ And several additional Tools and features


Even though FT8 is included, you can run this App along with your favorite external Software like WSJT-X, fldigi or others because:

■ CAT Support for FlexRadio CAT, Kenwood TS-2000 emulation and RigCtrl / Hamlib

■ DAX TX and RX audio streaming to any device


■ FlexControl support

■ You can use a Midi Controller (like the DJ2GO2 or CMD-Micro and others) to fully control your Radio

■ CW Straight Key / Paddle via Midi Controller, FTDI Serial Cable or assigned keyboard keys

■ External microphone support (e.g. for USB microphones)

Please note: This is no Catalyst Version of SmartSDR for iOS. This is a completely new written native macOS App.


- A FlexRadio Systems® FLEX-6000 series radio

- A Mac which runs at least Mac OS 11.5


FLEX-6300, FLEX-6400, FLEX-6400M, FLEX-6500, FLEX-6600, FLEX-6600M, FLEX-6700

Find out more here:

Read the Manual:

What’s New

Version 2.4.08

This update contains the following changes and improvements:

◉ Just a few minor improvements and fixes

Please use the CONTACT DEVELOPER feature inside the App to report any issue so it can be fixed real quick.

Thanks for your great support and feedback which helps to further improve this App.

Stay safe and healthy!


Marcus, DL8MRE

Ratings and Reviews

4.9 out of 5
41 Ratings

41 Ratings


It Just Works ... Seamlessly

Steve Jobs said, “It Just Works.. Seamlessly.” The same applies to SmartSDR for Mac. This is what Flex users with Macs have been waiting for, and it is well worth the money. I downloaded the app just a few minutes past midnight on the launch day. I fired up my Flex 6700 and 16” MacBook Pro, and I was off to the races. It literally took just a few minutes after downloading to get on the air. The app worked the first time with the settings in the same state that I had left the Flex in when I last used SmartSDR for Windows. A Mac version of FT8 is integral to the program via a drop-down from Tools on the menu bar. The functionality is very close to the WSJT-X standalone version for Windows. Other Tools include a Midi Controller (to replace the USB FlexControl dial which does not work with Mac), a helpful Network Stats pop-up, a Band Plan chart, a call sign lookup function, DX Cluster (your choice of a dozen), and a log book. So far, everything is working just as it should. I have not done any remote operating, however, due to coronavirus travel restrictions, but the SmartLink log-in is part of the app and always available. 73 de NV4NV

Rover Rich ,


I was skeptical about paying $160 for another program for my Flex 6400, but after trying the iOS version of the program I figured I'd give it a try. I recently purchased the radio and have been using the Win software and kept running into "driver" issues w/ DAX which further prompted me to try the MAC version. I must say that this software should be the default app for Flex radios. It just works with NO drama, all the built in features worked with no issues. The GUI is nicer than the Win version and FT8 app is perfect. Well done and highly recommended!

fizz306 ,

Nice, but not great for digital users

I've been using SSDR for iOS since it's introduction, and found the software to be intuitive, easy to use, and performs well. All of this has translated into the macOS version. It's a very visually appealing app on my aging 7 year old Macbook Air, and runs without issue. A testimant to the programmer's capabliities.

My issue is that this is a $160 desktop class app that provides mostly iOS levels of functionality. Firstly, the lack of a native DAX solution, of which the reccomendation to fix is an additional $100 piece of software from Rogue Amoeba. Keep in mind that this is just traditional DAX audio channels, and does not inlude any ability to get IQ audio from the radio. CAT solutions are limited to two connections at once.

After tax, we're near $300 in to get something close, but not near the same level as SSDR for Windows. It's a hard sell. If you're an SSB or CW kinda guy, it's a wonderful soloution. If you're more into digital stuff, and want to do someting/anything other than the built-in FT8 solution, just be aware of the lack of IQ and CAT limitations and added cost for external software to make it happen.

Developer Response ,

This is not fully correct. There are several other "free of charge" drivers (one is mentioned in the App's manual) so there is no need to pay extra $100. DAX IQ is also supported but at the moment, I am not aware of any Mac App which would support it. Saying that the App mostly provides iOS level is also not fair as the Mac Version allows multiple FT8 sessions, has a built in RTTY, HF-Fax decoder, a CW Keyer, a full features Logbook and an integrated Alert feature for various types of Alerts just to name a few features. 73s, Marcus, DL8MRE

App Privacy

The developer, Marcus Roskosch, 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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