The Oura Ring 4 offers the best balance of design, tracking and battery, making it an outstanding smart ring as a complete package.

The Oura Ring 4 can do the same as the Ring 3, but is housed in a slim titanium casing. The battery life is good and the ring can be conveniently charged on the pad - but only with a permanent power supply. The good and detailed analysis actually speaks in favour of Oura. But it is only available with a plan (5.99 euros/month)...