iOS app to give channel and width of connected wi-fi

Can someone recommend an app (preferable a free one) that will display some technical details about the wifi connection such as which channel it is using and the connection width (ie 20 MHz or 40 MHz etc)?

I can suggest one that does half of what you want. :grinning:

Apple's own "AirPort Utility" has a hidden Wi-Fi scanner that shows the SSID, RSSI, and channel.