Which applications can view the WLAN range?

Question

WiFi

What programs exist for viewing the WLAN range? I'm not interested in intercepting data, you just need to watch the intensity of their transmission.
If it’s completely scientific, then what applications can capture the WLAN-band signal?

Answer 1

is inSSIDer suitable?
or WiFi analyzer on android.

Answer 2

Here you need to understand a very significant difference between a real signal (radio signal) and the logical structure of the channels.
Many applications simply draw a beautiful picture with wifi logical channels and the signal level in them. But this does not reflect the full reality of radio signals in the WiFi range.
Simply put, an "analyzer" that looks like this is a conditional picture:
An analyzer that looks like this really works with the radio spectrum:
Only the latter still requires special hardware.