Something like Network Cell Info / Net Monitor / G-NetTrack on Android. They actually show tower locations with signal strengths. What I don't get is why the

Something like Network Cell Info / Net Monitor / G-NetTrack on Android. They actually show tower locations with signal strengths. What I don't get is why the author didn't draw the signal strength of all towers that were visible. This info is also trivially available. What public transport needs are microcells, and to hell with wifi.