electromagnetic waves indicator


hello,

have a cell still connected but certainly what about electromagnetic waves?

an app that displays the intensity of electromagnetic fields of different electrical appliances?
it would use the chip WiFi + BT + GSM to indicate the direction of the waves, giving the frequency etc..

in civilian life, will be interesting to get an idea about our electrical appliances on standby, to detect faulty devices, avoid places too saturated airwaves for our health, etc. ...

I found 3 applications:
GSM netmon,
Cell Tower Info
Magread: Requires magnetic adapter (similar to the playback head of a cassette player), plug into the jack on our n900!
what do you think