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:

■ New: now supports FT8 and FT4 (iPad and iPhone Max, Firmware 3 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 12

- 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 3.10.02

This update (sent to Apple September 15th) includes the following changes and fixes:

◉ Improved Network performance

◉ New Option in FT8: "Auto Log without Log Window" added

◉ Now, it is possible to enter frequencies >= 10 GHz

◉ Now, the Slice frequency can be entered using a physical keyboard

◉ The App now supports Keyboard Shortcuts (press and hold the Command key to get an overview)

◉ Some minor bug-fixes and UI changes

◉ Preparation for the next iOS Version

Thanks for your fantastic support and feedback.

Stay safe and healthy!


Marcus, DL8MRE

Ratings and Reviews

4.1 out of 5
65 Ratings

65 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.

Freddie1959 ,

It used to work great

It worked great until the last update. How do we contact you to resolve issues?
When selecting “Contact Developer” it brings you to Flex’s web page, not yours.

Developer Response ,

Dear OM, why didn’t you contact me to get help with your issue and instead wrote a bad review. A bad review will not resolve your issue.

Each of my Apps have a „Contact developer“ button under Settings in the „Information and Support“ section to contact me.

This button doesn’t bring up the flex website. The button above contact developer will bring up the flex website.

However, you can also use the contact form on

So far, you did not contact me. Why? Did you solve your problem yourself?

No response even 2 months later.

73, Marcus, DL8MRE

Drpaper ,

Best App for Ham Rsdio

I’ve been using this app since It was first brought iout. I have used it to remote operate my flex 6700 from many countries around in the world

Is truly amazing to be able to remotely control my ham radio station in California by either my iPhone or my iPad. It looks awesome on the iPad Pro.

I specially like the fact that It has alternate color schemes so that my poor old eyes can actually see the meters. And I specially like the fact that it has DX spots on the display. Spots on the display really speed up my workflow when trying to find DX

Bottom line this is probably the coolest way to use ham radio remotely

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

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

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