There are numerous features that a smartwatch offers to its clients but there is one amazing feature that has lately been gaining popularity among the users. That great and amazing feature is SmartWatch Sleep Monitor. This feature is highly used, recommended and embraced by users. This feature can help to users to have a sound sleep by playing a specific sort of music and also calculates the quality of sleep of the users. There are some best smartwatches that one should have including EFOSHM E3 Smartwatch, FitMotion Smartwatch and Microsoft Band 2 Smartwatch. These smartwatches are come up with all the needed and required features and apps.