This app logs and displays the four following states:
_unknown, not worn, awake, sleeping_
It derived from the SleepPhaseAlarm and uses the accelerometer to estimate sleep and wake states with the principle of Estimation of Stationary Sleep-segments ([ESS](https://ubicomp.eti.uni-siegen.de/home/datasets/ichi14/index.html.en)) and the internal temperature to decide _sleeping_ or _not worn_ when the watch is resting.
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