oh lord this home automation thing is a slippery slippery slope

But for those interested:

1- use home assistant. None of this cloud bullshit. 2 - Ikea stuff is Zigbee and you can seamlessly marry it with the above without even looking at their app. Also it is cheaper than any other zigbee stuff by miles.

If you want the easy route:

Tapo. It literally has a “local only” mode so you can deny it any and all internets and it will still work - as long as you’re within your local home network.