iOS
Network Analyzer - wifi scanner, speed test, tools
For iOS devices, but does not have all the WiFi details that are available on other platforms
For iOS devices, but does not have all the WiFi details that are available on other platforms
Mac OS
7 Best Wifi Analyzers for Mac OS
Windows and Mac
9 free Wi-Fi stumbling and surveying tools
Slides 3 and 9 are Mac apps
Android
8 Best WiFi Analyzer And WiFi Scanner Apps For Android
Linux
- Kismet Wireless
- LinSSD
- Wavemon
- Network manager command line interface:
nmcli d wifi
- Wireless LAN Sniffer Applications and Scanners for Linux
-- a long list that includes some of the above
Also see:
How to Find the Best Wi-Fi Channel for Your Router on Any Operating System