When choosing a smart health monitor, consider features such as accuracy, connectivity, and ease of use. Look for devices that offer reliable measurements for vital signs like heart rate, blood pressure, and oxygen levels. Ensure the monitor can sync with your smartphone or other devices for seamless data tracking and analysis. User-friendly interfaces and clear instructions are essential for effective use. Additionally, consider the device's battery life, durability, and any additional functionalities that align with your health goals, such as sleep tracking or stress monitoring.