AT&T Hackathon App -- Check your pulse via your iPhone camera (extra day of modifications)
Watch the video demo here: https://www.youtube.com/watch?v=MP4w6Pgr3ZE
Built in 24hrs (including 12hrs for PulseTest 1.0).
Improvements from 1.0: Sweet UI/UX, smoothing algorithm for better detection accuracy, cleaner code, smaller app size... just generally more badass.
The app uses AVFoundation for playing with the camera, and Parse for the login and user data back-end.