They must be, but they are running things pretty close to the bone. They had a home sensor platform that seemed cheap ($5!) and reliable, but Reddit forums are

They must be, but they are running things pretty close to the bone. They had a home sensor platform that seemed cheap ($5!) and reliable, but Reddit forums are full of complaints that a low battery bricks the sensors. Wyze will send you a replacement, but can’t engineer a fix on the fly, apparently.