[aaronem]

For those who don't own an iOS device, or don't feel it is the best tool to do this kind of analysis: The standard tool on OS X or Linux appears to be Kismet[1], which, while I haven't actually used it and so can't vouch for it firsthand, appears to be quite capable. I don't know what, if any, equivalent tool exists for Windows, and since I don't own a Windows laptop, I also don't really care.

Edit: Having now installed Fing and looked at what it does, it seems to basically just look at its assigned IP and netmask to determine the address space of the local network, and then perform an nmap-style ping scan to see what doesn't time out. When it gets a packet back, it uses the MAC address to identify the type of device, and a PTR lookup with the DHCP-provided DNS server to obtain a hostname. These are pretty cool capabilities to have on a handheld device, of course, but if you can't or won't install Fing, you can do pretty much everything it does with a 15-line Perl script on any device that can connect to the wireless network.

[1] http://www.kismetwireless.net/

[darkr]

Yeah, kismet and/or airscan are pretty much the two go-to tools for wifi security auditing.

Kali Linux (can run from a bootable live image) has these two plus a whole lot more useful tools for doing this kind of thing.

[maxerickson]

In the past I used inSSIDer to view nearby networks, checking to see how capable it is led here:

https://www.reddit.com/r/networking/comments/3fyjbm/now_that...

Which points to (pdf):

http://www.xirrus.com/cdn/pdf/Xirrus-Wi-Fi-inspectorguide-1-...

[finnn]

If you think Fring offers cool capabilities from a handheld device, you should check out Kali Nethunter[0]

[0] https://www.kali.org/kali-linux-nethunter/