Samsung offers extensive sleep tracking, with the sleep score being in the center. This score is calculated from the areas of the amounts of times spent sleeping, in deep sleep, in REM sleep, and in rest and relaxation, as well as the sleep latency.
In addition, trends are shown together with the recommendation on how to increase the score. The sleep phases are also displayed graphically on a timeline. There is information on the percentages of the phases, the times, and the capture of movements.
The Galaxy Watch8 also measures the blood oxygen saturation, heart rate, skin temperature, and breathing frequency during sleep. If the smartphone is also connected during the night, the smartwatch is supposed to recognize snoring and sleep apnea.
The app allows you to create a sleep protocol. If the watch is worn regularly, it creates an analysis of your sleeping behavior, assigning you a “sleep animal.” It offers optional sleep coaching with individualized suggestions for improvements. Alarms can be synchronized with the smartphone, but there is no smart alarm.