Oura's Ring 4 was a traditional smart ring, but Oura's patents show some incredible ideas that could pay off in the Ring 5.

The finger wearable comes with an array ... compared to the 3.3 to 5.2 grams weight of the latest Oura smart ring iteration. It's a bit expensive at $349, but it does not require a subscription ...

This would also make the ring more appealing to women. The Oura Ring 4 has five to seven days of battery life, depending on the model size and usage. It’s not bad, but it’s not great either.