SmartSDR™ - FlexRadio Systems‪®‬ 17+

Official SDR Client

Marcus Roskosch

    • 4.1 • 74 Ratings
    • Free
    • Offers In-App Purchases



This App works with any FlexRadio firmware 1,2 or 3, including version 3.3.29

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)

■ 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

■ Siri shortcut support

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 Apple device such as an iPad, iPhone or iPod Touch which needs to run at least iOS 14

- A newer iPad (Air 2 or newer) or iPhone (7 or better) is recommended


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. It is also optimized for the new iPad Pro models.


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 5.0.4

This update contains just a few minor fixes and improvements.

Thanks for your continoued fantastic support and feedback.

Stay safe and healthy!


Marcus, DL8MRE

Ratings and Reviews

4.1 out of 5
74 Ratings

74 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.

AsOUNdTeCh ,

Add some features?

Love the app and I have been using it for almost a full year. I am still finding features I did realize where there. Is there any hope for the possibility to record and play back audio on the frequency like we can do in the widows version or from the Maestro? I know we can have canned macros for contesting but I am looking at live so audio. Also, can a SSTV app be added as a tool? Steve, N8XSF


The Perfect Pocket Option!

The power of HF radio in the palm of your hand. Feel right at home whether you are in a restaurant, at the park, fishing on a boat or driving down the road. This APP provides all the features of SmartSDR and then some. No learning curve as the GUI is beautifully ported onto your modern iOS device with ease.

I use to have a radio in the shack, one in the car, one in the garage, one to take on the go, a receiver in the bedroom... well you get the idea. Now I have one radio in the shack that I can remote from everywhere!

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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.

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