Samsung Galaxy Watch update brings sleep tracking improvements1
Samsung Galaxy Watch brings a couple of improvements to the sleep tracking function. Up until now, the smartwatch could only track REM sleep if it was set to always monitor heart rate, but the new update removes that requirement.
In addition, the smartwatch now features a toggle for the REM sleep recording that allows users to enable or disable this function. Thanks to the update, Samsung Galaxy Watch battery life should slightly improve since you won't have to continuously monitor your heart rate in order to use REM sleep tracking.
Keep in mind that the REM sleep tracking will be enabled by default after the update, but you can disable it since now it has its own toggle.