4. Oura Ring Generation 3 (#124,685)

The Oura Ring might look like your average piece of jewellery, but it's loaded with sensors for your heart rate, respiratory rate and body temperature. It also features a 3D accelerometer for detecting movement. It's available in four different metal finishes, but you'll need to use a sizing kit to find the proper fit. While the sizing process is a little tedious, it's essential to fitting something you're supposed to wear 24/7. Speaking of 24/7 wear, the Oura Ring only needs to be removed for charging every 4-7 days. It's waterproof and protected against soaps, oils, or other elements your fingers may come in contact with.

Oura leads the pack as the best makers of smart rings to date, but with Movano promising slightly better features at a cheaper price, and with Apple's announcement of their smart ring patent, 2022 is shaping up to be the year of finger-worn wearables.