Wifiman – professional network analyzer app – free for Android and iOS

This app from Ubiqiti is 100% ad-free. Android and iOS versions are available.
WiFiman is ideal for analyzing nearby Wi-Fi networks and Bluetooth LE devices, device discovery, and network speedtests. These features are conveniently accessed through the sleekly designed UI created by Ubiquiti Networks. WiFiman contains no ads and is free of charge.
WiFiman helps you locate a less crowded channel for your Wi-Fi Access Point. It lists nearby Wi-Fi channels and Bluetooth LE devices and shows you the details of those channels.
With the app you can easily list and analyze devices connected to your current network. WiFiman scans the whole network subnet and shows you all of the available devices with the applicable details, using Bonjour, SNMP, NetBIOS, and UBNT discovery protocols.
Another core feature is the network speedtest. You can test the speed of your internet connection and save the results for later comparison – or quickly share the results.