I just use a Tapo Smart Plug, don’t know how accurate it is but it gives me an idea, my unRAID server runs idle at about 70w (with relevant drives spun down) not the greatest I know, in the iOS app you can input your local cost per unit and it will give you an estimate on daily/weekly/monthly running cost

Currently I run ntfy on a remote VPS, it notifies me of *arr warnings/errors, Jellyfin content adds, Jellyseerr content adds, uptime kuma status and also when a new device is added to my Tailscale network. Thanks to OP I will try to add notifications for tracking upcoming sports events

Wow this is super cool, UI and animations are superb, well done! Keep up the great work