I join the rest of you with Nest Protects that will need a solution in the future. Also an Apple guy, it's the only thing I own from Nest but I have 9 of them to figure out replacements for in the future. Here we have to have detectors in each bedroom as well as the common area outside of bedrooms and in living spaces not to include the kitchen. So, at $100 each when I bought mine, I have an investment. It's a small price to pay for what was/is the best rated detector.