[Renate]

I don't particularly like using somebody else's cloud or server when I don't need to. I moved into an apartment once with a Nest thermostat. I didn't even want to deal with it or have it second-guess me. I also didn't want it connected to my WiFi.

I see lots of health devices which connect to a cell phone which is running an app that connects to who-knows-what server. Nope. I'd rather just analyze the Bluetooth and write my own (local) app.

I turned down the temperature of the Nest to its lowest (5°C?) and paralleled the wires to my own internet connected controller. As I used to leave work at variable times I found it easier in winter to just turn the heat on when I left work.