What is a smart ring? An introduction to tech-laden jewelry

Smart rings have been in development for years. But only recently have a number of brands emerged that have created smart rings that look good, feel good and pack useful tech into such a tiny form factor. Put simply, a smart ring is a ring that’s got some kind of tech built into it, whether that’s an NFC chip or sensors, like an optical heart rate monitor or accelerometer. Most of them can also sync up to your smartphone via Bluetooth, enabling you to find out more about th