First Alert delivers a connected-home portfolio with a personal twist: A smartwatch

By its name alone, you might think First Alert’s new Onelink series of home-safety products at least shared a common app, even if they weren’t integrated into a single system. You’d be mistaken. There’s nothing inherently flawed about the thermostat, combo smoke/carbon-monoxide detector, and other individual pieces in this new lineup, but First Alert missed a great