The overall UX isn't going to be as nice as with WakeMate, and there aren't currently any analytics, but if you want to take the technology for a spin you can use my app Circadian Alarm (has a silent feature):

http://itunes.apple.com/us/app/circadian-alarm/id330721657?m...

Anyone wants to try it, send me an email and I'll give you a coupon code so you get it free.