Can someone explain laundry app?

Use this Device Type:

SmartApp:

I have a SmartApp that I wrote that is what I use but most people are using the one I linked above.

The only caveat I’ve noticed is that the device type seems to report readings multiple times in certain situations resulting in a notification for each reading, meaning you might get 2 notifications at the same instant. The reason for the notification is still accurate and good, but if this sort of thing bothers you (or your wife) you might want to mitigate it in some way. It doesn’t bother us enough for me to look into it.