Note: Maestro doesn't support or sponsor this app in anyway, this is purely as a reference for an easy and free way to scan your Wi-Fi networks.
The app will show you all the information of the Wi-Fi networks around you, like the Channel number, Frequency, band, and the device MAC address and Manufacturer.
Device list
The most useful tab is the 'Channel Graph' where you can see a the span and power of each channel, this makes it easy to scan and find a good channel for your router, as well as moving in the most important location to scan for your hot spot signal / noise level.
Channel Graph