Off the top, I have to say that our house is heavily invested in HomeKit. That preference does tend to narrow down the choices somewhat, but fortunately there are companies like Eve that do an exceptional job of supporting HomeKit. We wanted to be able to monitor the temperature and humidity in various rooms in our house, and while these have the added bonus of air quality, they fit that requirement at a reasonable price. They're small, so they are easy to place wherever you want in the room. My only gripe is setup; it took a few tries to get each one to play nicely with our network. I'd scan the QR-ish code in the (very excellent!) Eve app, and it wouldn't appear. It took some futzing around (and I can't be more specific because I'm not sure what actually caused it to work), but we finally got all three working. After that, it's been a breeze. We can ask Siri what the temperature, humidity, or air quality is in a room, and get a response. The Eve app also lets us go and look at historical graphs. Plus, they can integrate with triggers to perform actions like kicking on a fan when it starts to get warm. Overall, they are worth it. Setup issues aside, they're solid, reliable, and rechargeable. No complaints here, in fact we plan on buying some more.

This sensor works well and does what it should. It connected easily to Apple HomeKit and in the Eve app. When I apply any body spray or heavily scented lotion, the reading on the sensor changes as my heppa filter also senses it and turns up. I like Eve products since you can use the Eve app without registering an account or giving them any of your personal information.

I bought this a month or 2 ago to replace the netatmo room temperature sensor that went out. If you lose power or internet your still able to check the temp on the eve room.

Easy setup and now has thread. It works great and gives me accurate temperature readings.

It doesn't support Android only iPhone so the sensor itself is absolutely useless without the app.