SmartSDR™ FlexRadio Systems‪®‬ 4+

Official SDR Client

Marcus Roskosch

    • 4.9 • 47 Ratings
    • $99.99



This App works with ANY FlexRadio firmware 1, 2 or 3, including the newest release

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).


■ Native macOS 14 (Sonoma) App, backward compatible to macOS 13 (Ventura)

■ Runs natively on M1,2,3 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 2.9.25

This update contains the following changes and improvements:

◉ This update resolves a non-announced recent change by LOTW.

NOTE: QSOs after May 5th may need to be re-submitted to LOTW. For this, set up a 30-day filter in the logbook, use the Mass Change Utility to select LOTW in the QSL Section, mark as "Not Sent," apply changes, and resubmit for acceptance.

◉ Further improved QSL logging window

◉ A State column has been added to the Logbook

Kindly use the 'CONTACT DEVELOPER' feature within the app (Help, Information & Support) for any issue reports. I will ensure it is promptly resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.


Marcus, DL8MRE

Ratings and Reviews

4.9 out of 5
47 Ratings

47 Ratings

K3uk ,

Very Good ! Including with digital modes

After decades of working with Windows I Purchased this app to use with my new Mac Mini . It comes highly recommednded by many Flex Radio users. I must say that the software is superb . There are a few differences compared to the Windows version, DAX and CAT take a little getting used to but work fine for most common ham usage. I must take issue with a past review that says it does not work well for digital modes. The author mentions Loopback and Blackhole applications for audio routing. I tried both and found the free Blackhole to be the easiest to use. I use SmartSDR for Mac OS with Fldigi . For FT8 and RTTY I simply use the native "tool" that Marcus has built in ... because the FT8 tool performs as well as WSJTX and I think is visually more appealing. The POTA tool and DX Cluster features are also very well implemented. I have used 4 instances of the FT8 tool at the same time using a Flex 6600 and the FT8 implementation that Marcus designed. My Mac Mini M2 handles this well. The CAT port implementation in SmartSDR does not seem as flexible as the Windows version of SmartSDR CAT but I am not sure all that is needed. I am using SmartSDR for Mac with Yuri UT4LW's SDC Software Defoned Connectors . The two apps work well together and SDC allows me to use the Mac with SDC's CW and RTTY servers, plus SDC's contest modules.


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

Irvin3 ,

Great Support Great Program 'FB' all around

SmartSDR Mac not only works impeccably but includes several functions that require additional software using the Window SmartSDR (not to mention the sometimes strained integration under Windows). FT8 comes to mind but there are other 'Tools' included which Just Work.

The Tools menu content tells the tale: CW Keyer, Keyboard, Controller, Genius Devices, Band Plan, Frequency List, Call Lookup, DX Cluster, POTA, PSK Reporter, Recording, Voice Macros, Alerts, Logbook, CW Decoder, HF-Fax, RTTY, FT8.

Excamples. Genius Devices are fully integrated to include the ability to manually define. Call Lookup is basic but includes the ability to call the full info from your source (such as QRZ). The integrated logbook is no DX Labs but being fully integrated and plenty capable it's all we mostly ever need. (You can integrate with various external logs too. Including DX Labs). CW Decoder works as well or better than any. FT-8s set up the radio and panadapter with one mouse click.

Finally. I've personally had one or two glitches. (Nothing that affected operation really). Support response from the developer has been superb. Flex support is nothing to compalin about. But SmartSDR Mac software support will actually come back with something like '... your issue is fixed ... it will be some time before Apple publishes ... look on the AppStore in the next few days".

Well worth the $159. Peanuts to compliment a sevral thousand dollar radio.

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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