Minmum Sleep Time Required
What is the minimum time required asleep for Apple Watch to recognized you are sleeping. I had 1 hour and 15 min nap before work that was not recoreded in Health App, I have had simiar issues when using Sleep ++ which seems to need 2 hours but AutoSleep App see to recognize time asleep shorter than 1 hour.
There is a way to put watch in Sleep mode but that does not seem to manually start a sleep session as teh previous two apps which have a manual start