I put mine on a zigbee plug into my home assistant (docker on nas), and created an automation to notify me when the power consumption drops below 1 W or so (lower than when it’s only running the fan when the hunidity is near setpoint). All local, works so far.
I’m using “home assistant” and add them there via the zigbee integration.
Edit: I have the Nous zigbee sockets, never used any other app than home assistant to do anything with them. They also have a small button with a light so you can still switch them on/off without any app. Via home assistant you can read out various info like power, current etc