I’d like to update this thread with a tool that I’ve purchased recently. It replaces Ping and Fing in my post above and offers much more.
It’s called Network Analyzer Pro
(available for both, iOS and Android. I’m using the iOS version).
What makes this one very interesting to me is that it works with my USB C Ethernet adapter on my iPad Pro 11 and my iPhone with the Ethernet lightning adapter. So I can use the iPad or the iPhone as a wired scanner and analyzer that I can plug into any network or device (e.g. a router). This opens up a lot of possibilities in mobile troubleshooting and diagnostics. No need for a laptop with an Ethernet port anymore.
Other apps I’ve tried complain if they find the device’s WiFi off.
The adapter I’m using with the iPad Pro 11 is Nubihub USB C
One caveat is that it doesn’t charge my iPad when I plug my charger. But I’m willing to overlook that for what I’m getting.
The other adapter
has a lightning connector and works with my iPhone. but it’s not as good as the Nubihub, quality wise and functionality wise.
I thought of posting this in case someone needs a similar solution.