This was on my TODO list for a long time and now it is done:
You can now record the whole spectrum into a file for as long as you want.
I think this is a great tool for documentation and education.
Also, this will allow people without the SMA Simple Spectrum Analyser hardware to play with a real spectrum! While you cannot change the frequency or sample settings during recording or replay, you can carry out measurements, use the marker and the traces.
Download the latest version here: