Apps by Marcus & Jan Roskosch

Highly productive Apps for engineers, students, hobbyists, HAMs and technical enthusiasts

The Apps ...

All Apps have been developed because they were missing or because there were no adequate solutions available on the App Stores - so we had to develop them on our own, and here we are ...

TS-Control for Kenwood

Now available!

for the TS-890

FT-Control for YAESU

Now available!


By Jan Roskosch

Now available on the iOS and Mac App Store

HAM-Toolbox for iPhone, iPad and macOS

SmartSDR for Mac

FlexRadio Systems official Mac Client

Mac Users: No PC needed anymore!

SmartSDR™ for Mac comes with all inclusive:

  • Full featured FlexRadio 6xxxx series Client
  • SmartLink inclusive registration
  • Firmware Updates to your Radio
  • As many Panadapters and Slices your Radio is capable of
  • FT8 included
  • Logbook included
  • For your external Software: CAT and DAX included
  • And much more…

SmartSDR for iOS

FlexRadio Systems official SDR Client

Convenient Operating using your iPad or iPhone

SmartSDR™ for iOS illustrates the versatility of the SmartSDR ecosystem when paired with the FLEX-6000 Signature Series SDR to utilize Apple mobile devices for radio operations. It was designed for those who want to have all the features (and even more) of SmartSDR for Windows on their mobile device either to operate from home or remotely.

Electronic Toolbox and RF-Toolbox

Electronics at your fingertips

Electronic Toolbox

#1 App for engineers, students, hobbyists and HAMs

Electronic Toolbox


Scanner Software for AOR AR-DV1 SDR

Great software for a great Scanner!

Manage the AOR AR-DV1 Software Defined Radio using this App.

This Radio Scanner App is designed to get everything out of your Scanner.

Frequency Scanning was never easier.


DX-Cluster database

Don’t miss a spot

Your handy DX-Cluster real-time connection. Never miss a spot anymore. Get alarmed for Calls, DXCCs and your most wanted countries.

Get licensed for HAM Radio

Prepare for your HAM Radio license

These Apps helps to learn for the HAM Radio License Exam. It covers the German A and E Classes as well as the US Technician, General and Extra Classes

PLEASE NOTE: If you already own one of these Apps, kindly use the App included Contact Developer feature instead of this form.

Get in touch

Any questions, suggestions or issues ? Please leave a message and I will come back to you shortly.

Use my App

If you already own one of my Apps and if you contacting me regarding this App, please use the Support button located in the settings section.


If you are using this contact form, please double check your Email address. I often receive messages where it turned out that the sender entered a wrong Email address.

I will get back to you - promised

I will always respond. Sometimes I get hundreds of mails per day so please be patient.