Oura has launched the Ring 4, enhancing comfort while maintaining its role as a passive fitness tracker. The new model features a more flush interior design and expanded sizing options, catering to a broader audience. Unlike the Apple Watch, the Oura Ring is designed to blend into daily life, focusing on sleep tracking and gradual health insights. Its battery life of up to eight days outperforms many smartwatches, making it ideal for overnight wear. Oura's recent acquisition of Veri indicates a push towards more comprehensive health metrics, including blood sugar monitoring.