internet needed for app to work

My finding is that the W19 app cannot access the W 193 device when the router is disconnected from the internet. I did a test. The local network was still running fine and wifi was on. But internet access was disabled.

I suppose this also means that all "notices", (e.g. everytime the pir sensor or door sensor sends a notice) are send via some server?

Suppose it makes sense when you are out of the house and need to get a notice.......