Best Smartwatches:

Apple Watch:

Pros:
- Extensive in-house sleep tracking with accurate measurements.
- Automatic detection of sleep and wake times.
Cons:
- Limited compatibility with non-Apple devices.
- Mixed reviews on the accuracy of blood pressure readings on Galaxy watches.

Garmin Venu 3:

Pros:
- Good battery life and custom power-saving options.
- Detailed running data for outdoor activities.
Cons:
- Limited integration and software issues like missing battery management options.
Offers best health monitoring and a robust eco-system.

Fitbit Charge 6:

Best health tracking options but may require subscription for premium features.

Amazfit GTR 3:

Good functionality and long battery life of 3+ weeks.
Limited smart features but great value for the price.

Huawei GT 4 41mm:

7-day battery life and accurate heart rate sensors.
Limited voice assistant features.

Samsung Galaxy Watch 7 or Ultra:

Offers a good balance of functions and smart features.
May not have the same app support as Apple Watch.

Huwei Watch D:

Features a real blood pressure cuff integration.
Issues with bad smells after exercise.

Pixel Watch 2:

Offers smooth performance and fast charging.
Less pre-installed apps but reliable and fast.

RoleMaster Black Line:

Loved for its design and expensive look.

Pixel Watch 3:

Promises similar features to the Pixel Watch 2 with potentially better battery life.

OnePlus Watch 2:

Offers great battery life with fantastic features.

Amazfit Bip U Pro:

Features built-in Alexa support and accurate fitness tracking.
Integrated GPS for precise distance and steps tracking.

Redmi Watch 3 Active:

Provides good functionality at a budget-friendly price.

Xiaomi Mi Band:

Reliable and long-lasting with good message and workout tracking capabilities.

Huawei Band 9:

Offers basic functionality with smooth performance.

Cross Borders - Booka Shade:

Appriciated design and concept features.

App Recommendations:

AutoSleep: Tracks sleep efficiently even for short naps.
Beddit: Under-mattress sensor for accurate sleep tracking.
Golen Eye touch: Suggested for enhanced design aesthetics.

User Experience on Sleep Tracking:

Varied experiences with sleep tracking accuracy on different devices.
Mixed reviews on Apple Watch's deep sleep tracking compared to 3rd party apps like AutoSleep.

By consolidating user comments and experiences, Apple Watch is favored for its extensive in-house sleep tracking, while Garmin Venu 3 is praised for its detailed running data and power-saving options. Fitbit Charge 6 is recognized for value in health tracking, and Amazfit GTR 3 for long battery life. Each product has its advantages and drawbacks, making it important for users to prioritize their needs when selecting a smartwatch.