Smart home and building
Lighting, curtains, climate and intercom on one controller, wired so it still works when the internet does not.
Local control first, cloud second. If the connection drops, the switches still work, which is a wiring decision rather than an app feature.
Common questions
The switches still work. Local control is wired first and the cloud sits on top of it, so losing the connection costs you the app and nothing else. A smart switch that stops being a switch is not one.