Sleep Analyzer for Just a Buck

One dollar can still go a long way. Check out this app if you're having trouble sleeping.

Description of the App in the App Store (Sleep Cycle alarm clockBy Maciek Drejak Labs):
"An alarm clock that analyzes your sleep patterns and wakes you in the lightest sleep phase - a natural way to wake up where you feel rested and relaxed. We are now helping more than 100 000 people to wake up rested!"