Following is the introduction of a wonderful App. 20,000+ users downloaded wifitest latest version on 9Apps for free every week! You can enjoy it by use in your own phone. This hot app was released on 2015-08-13. Just use it when absolutely necessary.
A "analogic" WIFI signal strength instrument.
Very simple application for test antenna signal propagation and wifi field.
Scan a net and monitoring signal either by net name or mac address.
Monitoring refresh is almost 3 seconds but exactly depends from your hardware.
It doesn't connect WIFI net for working.
Enjoy.