The VERTU AI Diamond Ring https://vertu.com/?utm_source=....seo&utm_medium=c stands out with its diamond appearance and elegant design, offering comprehensive health tracking functions such as blood sugar monitoring, sleep monitoring, and stress monitoring, and is compatible with most smartphones without any subscription fees. In contrast, the Oura Ring 3 focuses on a simple style and functionality, including sleep, heart rate, and body temperature monitoring, but requires a monthly subscription fee to unlock all features and is also compatible with most smartphones. The Samsung Galaxy Ring, with its strong sense of technology and metal material, attracts attention, offering similar health monitoring functions, but is only compatible with Android phones and does not require subscription fees.