Sleep Plus Plus is my favorite. Lelia, I got my watch last September. I had always wondered about my sleeping patterns, and there was a possibility that I had sleep apnia. My favorite app for this so far has been Sleep Plus Plus. I like that it interfaces both with the watch and with the iPhone app. You can get a summary of your sleep in the watch app, but if you tap on the push notification it throws you in iOS, you can get a nice overview. The only thing that it doesn't do is to tell you how many times you were awake. There's manual tracking, which I need to play with more. I love it.