@kudzu Thank you for answering! I was pushing the off button like I did on my CPAP, but when I come back, I turn it back on. The next morning on my Air it is just showing the time on the first starting. Not the time after I turn it back on! I read somewhere that if you leave your mask on going to the restroom it will not shut off the time! Just unplug the hose so it doesn't think you have stopped for the night. I just never had that happen on my RESMED 10 Auto CPAP but I guess it is different or like you say they have programmed it differently! I took a pic of it with my camera today because on the machine it showed my time after but not on my air app! Does that make sense? NO!