Plus Sports has Smart Alarm Clock (iTunes Link) for the iPhone and iPod Touch and Smart Alarm Clock (iTunes Link) for the iPad in the iTunes App Store for FREE (regularly $1.99) for a limited time.

Smart Alarm Clock monitors your sleep phases, determining exactly when your body is most ready to wake up! It can records all the sounds you make during the night, so find out if you snore, and listen to other nightly disturbances that might keep you from your hard-earned rest!