Certainly, smartwatches have become versatile gadgets that cater to both men and women, offering a range of features beyond telling time. Here are some popular smartwatches suitable for both:

1. Apple Watch Series: Known for its comprehensive health and fitness tracking, apps, and integration with iPhones. The Apple Watch Series offers various models with different features and price points.

2. Samsung Galaxy Watch Series: Compatible with Android phones, these watches offer fitness tracking, sleep monitoring, and customizable watch faces.

3. Fitbit Versa Series: Focuses on health and fitness tracking, providing features like heart rate monitoring, sleep tracking, exercise modes, and long battery life.

4. Garmin Forerunner Series: Particularly popular among fitness enthusiasts, offering advanced running metrics, GPS tracking, heart rate monitoring, and other sports-related features.

5. Fossil Gen Series: Combines style with smart features, offering various styles for both men and women, with features like heart rate monitoring, fitness tracking, and customizable watch faces.

When choosing a smartwatch, consider factors like compatibility with your smartphone, the ecosystem of apps available, battery life, fitness tracking features, style, and any specific functionalities you may require. Many smartwatches now offer customizable bands and watch faces, making them suitable for various preferences and styles.

Sleep and heart rate monitors are essential features found in many modern smartwatches and fitness trackers. These monitors provide valuable insights into an individual's health and wellness.

Sleep Monitor: This feature tracks your sleep patterns, duration, and quality. It typically provides data on your different sleep stages, including light sleep, deep sleep, REM (rapid eye movement) sleep, and awake periods throughout the night. With this information, you can better understand your sleep patterns and make adjustments for improved rest.

Heart Rate Monitor: A heart rate monitor measures your heart rate continuously or at intervals throughout the day and during workouts. It gives insights into your resting heart rate, which can reflect your overall cardiovascular health, and tracks your heart rate during exercise to gauge intensity and calorie burn.

These monitors often work in tandem to provide a comprehensive view of your health. Many smartwatches and fitness trackers use optical sensors on the underside of the device to track heart rate and, through motion sensors, analyze movement during sleep to determine sleep patterns.

It's important to note that while these monitors offer valuable information, they might not be as accurate as medical-grade devices. They can, however, provide a general overview and trends in your sleep and heart rate, aiding in making lifestyle adjustments for better health.

When selecting a device, consider the accuracy of its monitoring features, battery life, comfort, and compatibility with your smartphone or other devices to sync and analyze the collected data.