If you run linux (possibly also unix) it's not too hard to set something similar up locally. For example, add the following to your crontab:

  ping -c 4 gstatic.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | ts '%F %T' >> pinglog.txt

and tail the log file or use a tool like LiveGraph (https://live-graph.sourceforge.net/) to get a live graph of it.