Last Updated on December 31, 2025 by stlplace
Started this a bit over a month ago. Better late than never. I had Apple Watch since Jan 2017, and Apple Watch released sleep tracker in 2020.
Some observations
If the watch was taken off during the night, say 2 to 3 hours, the sleep tracking got reset – which means you will likely get a bad sleep number (low score).
Also, I am not sure how accurate the Apple watch does in terms of sleep tracking – I assume it measures the heart beat (from the pulse in the elbow). I had similar questions re: the Apple watch swimming tracking too. It seems to me they are rounding up the number there.