Review on 🌬️ Airthings 2950 Wave Radon: Accurate Smart Radon Detector with Humidity & Temperature Sensor – No Lab Fees – Battery Operated - Free App by Adam Matthews

I've found that it only streams from the device to my phone (and then to the cloud) when I'm in range, but I didn't notice that the device apparently cannot store data for more than a few days at a time. I have a hard time syncing it to my phone without swinging it around and sometimes I have to turn it upside down before it syncs. But lots of data is missing if I forget to force sync every day or two. This is bad design and I also question the accuracy of the data based on wild swings in radon levels. Too much money for something with the above issues - I think I'll return it.