The best replacement for inssider is netstumbler.

The best alternatives to inssider are rated as following:
★★★★★  netstumbler
★★★  wifi explorer
★★★  vistumbler
★★★  xirrus
★★  wifi analyzer
★  kismet
  istumbler

Your alternative for inssider is not listed? Suggest!
Speaking about inssider, one probably shouldn't forget about hidden ssid.

Other search terms related to inssider and their ratings are:
★★★★★ hidden ssid
You have in mind a companion for inssider and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of inssider in all years. Click on graph for more.
inssider
netstumbler
wifi explorer