Free iPhone app which uses the camera to detect your heart rate.
"The first and only app that allows you to check, track and tweet your heartbeats on the iPhone 3GS or the iPhone 4.
Pulse-o-matic is a stylish and simple app that uses the iPhone’s camera to take your pulse. It’s easy to use - all you need to do is place your finger over the camera and Pulse-o-matic will display your heart-rate, graph-style, on the screen."
How it works: http://pulse-o-matic.com/How_It_Works.html
Note: This program does not use a random number generator, it legitimately attempts to determine your pulse.
If you're having issues, please read about the iPhone's limitations.
http://pulse-o-matic.com/Limitations.html
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