Not working !! – iPerf - Speed Test Tool Review

I'm very disappointed after buying this app, seems to be not working and tried many a times as iperf sever and iperf client. I wanted to know if any one has a working scenario ? I was trying To connect from iperf client of a WLAN acces point console and no response from iperf server running on mobile, though ping works fine !
Review by Shashaankar on iPerf - Speed Test Tool.