This is a poor metric – AR WiFi Analyzer Review

It tests ping times only which isn’t really that useful. What this should be measuring is throughput. The author should run an iperf server and then be taking measurements of both throughput and ping. Maybe limit iperf to 10Mbps (which is basic usage) but have a paid add on for up to 1Gbps. That way you can map your house with real throughput, not just ping. Would be nice to run your own iperf server for free unrestricted.
Review by Piesyne on AR WiFi Analyzer.