3 ms·

There are some common algorithms for sleep/wake classification from accelerometer input, but sleep stages algorithms are all proprietary as far as I know.

• antisthenes 9y ago
  Which is another way of saying "no way to verify if they're bullshit or not".
  • fleetingmoments 9y ago
    Not true, anyone could take them to a sleep lab and compare to Polysomnograph-based sleep scoring. I'd love to see a large, independent study on this for a couple of the leading trackers.
  • deleted 9y ago
    [deleted]