The Aivela Ring Pro combines health tracking with programmable gesture controls for all your favorite tech gadgets.

On paper, at least, Aivela is giving the smart ring category a different spin, shifting it from passive health tracking toward more active control.

There’s no set rule on how much you should spend on an engagement ring, but it’s important to understand the factors that go into costs—like diamond GIA gradings, carat weight, and settings—to ...