SmartSDR™ - FlexRadio Systems‪®‬ 17+

Official SDR Client

Marcus Roskosch

    • 4.1 • 93 Ratings
    • Free
    • Offers In-App Purchases



This App works with any FlexRadio firmware 1,2 or 3, including version 3.5.x

Official FlexRadio Systems® Client

SmartSDR is a full featured radio client that enables your iPad or iPhone to operate your FlexRadio device.

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

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

However, the App also contains a FlexRadio Simulator (Demo Mode) so you can try this App even without owning a FlexRadio. PLEASE NOTE: The Demo Mode audio is by far not as good as when connecting the App to a real FlexRadio. That quality is identical to SmartSDR for Windows.


SmartSDR offers almost all features of SmartSDR for Windows such as:

■ Supports FT8 and FT4 (iPad and iPhone Max, Firmware 2 required)

■ Included CW Decoder and keyer

■ Creation, maintenance of Slices, TNFs, Filters

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

■ CWX support including Sidetone and live send mode

■ Software Paddle or Straight-Key support

■ Maintain all Radio, Slice and Panadapter settings

■ Support for Memories

■ Profiles integration (TX, Microphone and Global)

■ Audio settings supported including equalizers

■ Support for TX Settings like Power including all Tuning features

■ Transverter support

■ SmartLink™ remote access

■ MultiFlex™ support

■ SmartControl support

■ HomeKit support to control radio, antenna switches etc. remotely

■ Direct support for Power Genius XL (PGXL), Tuner Genius (TGXL), Antenna Genius (AGXL) and Rotator Genius (RGXL) local and remote

For HomeKit, you can use any Power Plug or Switch that are HomeKit compatible.

In addition to SmartSDR for Windows, this App offers these features:

■ Band limits and Band maps and modes will be displayed inside the Pan adapter (In-App Purchase)

■ DX Cluster support which displays spots directly inside the Pan adapter (In-App Purchase)

■ Graphical tuning knob for easy and exact frequency selection.

■ Various additional minor bells and whistles such as easy TNF maintenance,

■ Direct Bandwidth selection, Split Mode, instant Memory creation and more.

■ Device logging and device parameter monitoring (e.g. PA Temperature etc.)

■ Logbook integration with ADIF Im- and Export (In-App Purchase)

■ Support for two Bluetooth and USB Controllers (In-App Purchase)

■ Voice Macro recording and playback

There are just a few limitations compared to SmartSDR for Windows which are:

- Only one Panadapter visible at the same time.

- Diversity is not implemented.


- A FlexRadio Systems® FLEX-6000 series radio

- An iPhone or iPad that runs at least iOS 16


To run this App at your home, nothing else but a regular WiFi connection is needed that can access your FLEX-6000. You can immediately start using the App.

For Remote operation via SmartLink™ a Version 2 License is required for your Radio.

The App supports Splitscreen Multitasking on the newer iPads so you can run SmartSDR in split mode parallel to your browser, Email software or any other App.


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 6.9.05

This update contains the following changes and improvements:

◉ Fixed an issue with Call Lookups, also for showing states in FT8 and DX-Cluster

◉ Fixed an issue with logbook Custom fields

◉ This update fixes a few minor remaining issues after the recent Major update

Kindly use the 'CONTACT DEVELOPER' feature within the app 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

4.1 out of 5
93 Ratings

93 Ratings

0xACE ,

Mostly good

It’s very nice to be able to control my flexradio from my ipad. Sitting on the deck or away from home. The iPad SmartSDR gives nearly complete functioning of the flex.

Held back on the final star as the user interface does not have any keyboard control. I cannot type in frequencies or use the arrow keys to tune across the bands. While the iPad is primarily a tap-device, the keyboard is a very common accessory and should be supported within the SmartSDR app.

Developer Response ,

Dear OM, thanks for your review. Unfortunately, there is no way to access these keys on iOS. I would wish it would be possible and in that case, I won't hesitate to support these keys but it is not possible. My suggestion is to use a MIDI controller like the DJ2GO which is supported by my App.


Remote Operating At It’s Best

I bought a Flex 6400M with idea of operating it remote when we were out RVing. The radio is great and the pc software works great too. But I have a tether speed limit of 5 Mbps and was concerned that would not handle the radio data very well. The iPhone version works so well that I use a HDMI cable to the 50” tv and I am enjoying the hobby on the road without putting up additional antennas. The software works great! The sound quality through my V1 airpods is superb too. I’m super happy with the software and highly recommend it. 73s KJ5WO

Rogertees ,

Double Payment

I am writing this to complain about a double payment required. I bought the app for my iPhone and then wanted to use it on my granddaughter’s iPad. I had bought her the iPad for Christmas last year and she has graciously loaned it to me to work remotely when we go to the lake. I have found that 82 year old eyes do better with a larger display. She has her own Apple ID and because it is different from mine, I can only use it if I pay another $65. Other than having to pay for it twice, I think it is a great app and I will gladly rate it five stars if I can use it without having to pay for it again. It is advertised to only have to pay once!

Developer Response ,


You should have contacted me using the App included Contact developer feature. It is NEVER necessary to pay twice. BUT you will have to use the same Apple ID as all purchases are always tied to an Apple ID. Please contact me now and I will try to help.

73, Marcus, DL8MRE

Unfortunately, nobody contacted me so I can't help. A shame. Strange though

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

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

More By This Developer


You Might Also Like