[marincounty]

I agree. They are so cheap. The ones I install are less than ten dollars. Won't name the brand. They are usually on the bottom of the shelf. Hidden away from worrisome consumers that equate price with function. Many contractors buy them by the case.

I usually install two, and run a electrical line to one.

Yes, an app is fine if you burn food, and have the disposable income? I would rather see home owners spend the money on running a line to their smoke, and CO detectors though.