Two of the standout features of the Oura Ring 4 are its impressive comfort and extended battery life, both critical in the competitive smart ring market. The ring's flat design with receded sensors is revolutionary, enabling comfortable wear throughout the day without irritating the skin while providing an exceptionally long battery life of eight days, significantly outpacing competitors.
While the new Ring 4 is more comfortable than its predecessor, it's worth noting that its lack of protruding sensor domes can affect its grip. My experience showed that while the Ring 3 kept its position firmly on my finger due to those domes, I experienced slippage with the Ring 4. The promotion of comfort does come with trade-offs for secure fitting, especially during sleep.
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