Bought a little temperature/humidity sensor for the garage. Displays temp in F or C to a tenth of degree. Wi-fi connected. Yes, yet another app, but it integrates easily into Google Home or Alexa. I think the app server keeps a year or some such of data, but I haven't really looked at that yet. Oh yes, on demand backlight display.
Also date/time synced to the Net.
$10
Insane.
@lauren you paid with your privacy.
I have a similar sensor but Bluetooth, 2x the price though but connected to my local open source Home Assistant server instead of an untrustworthy app.
@robryk @lauren @waps Sure, but who cares? With the MAC address, they can make an approximate guess as to the type of devices I have in my home, which they can use to, maybe, advertise at me better, or build a market-research correlation table to do better capitalism.
Why is it my problem if they do better capitalism? Good on 'em. Capitalism harder; everyone has something important to them.