I use Uptime Kuma as mentioned in another comment, but also Speedtest Tracker which makes automated speed tests at the interval of your choice and displays them in a coherent dashboard. It’s pretty neat and it did help me figure out a few things about my network.

Signed up to Lemmy today, but held off to see if the Reddit situation was going to get any better. Seems like it won’t, so one big hearty fuck you to them.
I’ll try and contribute as much as I can to this community.