WiFi Crowding Channel Finder

Hi, I'm trying to find an app for iPhone or iPad or netbook that would allow me to check what channels are in user nearby to ensure I can select a channel that isn't used. Terrible wifi issues and feel that this could be the trouble. Something that would allow me to see channels in use would be a great help


Many thanks in advance for any kind help

Try here or here
The one I installed on my (Windows) netbook is here

Good post here on which channels to use.