[TedDoesntTalk]

I think you have to pair the app. Otherwise anyone could control your thermostat, even from outside your front door.

[withinboredom]

But what if you leave your kids at home? How would it know their phones? I wouldn’t give my kid the power of the thermostat, the pranks would be endless…

[TedDoesntTalk]

It also has a motion sensor, as OP mentions.