It’s a big flaw that there is no Smith-Chart in the Spike program. I bought the SA44B and TG44A for on-line antenna tuning and matching. But it turns out to use a less stable old version of the software.
My previous antenna analyzer RigExpert-1400 allows you to draw VSWR, Smith-Chart, Return Loss by switching between windows, but in off-line mode.
Request to develop, correct this problem.