What application to graph the Wi-Fi signal?

Question

WiFi

I read an article on wi-fi antennas . The author gives a graph of the wi-fi signal level. What application was used to plot the graph?

Maybe some other software options who knows?
Except InSSIDer, Ekahau HeatMapper.
For iOS there is a similar wifi analyzer program

Answer 1

Maybe some other software options who knows?

I think inSSIDer can help you.