Android: Don’t rely on simple signal strength meters to explore the Wi-Fi nodes around you. Wi-Fi Analytics is a free and feature-packed Wi-Fi scanner.
Wi-Fi Analytics doesn’t just display the available networks it also shows what channel they are on, the signal strength, the SSID, and MAC address of the router, and the type of encryption. In addition it will also check all the channels in use around you to suggest an optimum channel for your own equipment to minimize interference as well as chart out all the signal strengths and channels in your vicinity.
The ease of use and abundant but practically organized information makes Wi-Fi Analytics Tool one of, if not the, best free Wi-Fi tool we’ve used. Wi-Fi Analytics Tool is free, requires Android 2.0+.