Sometimes it seems that smartphones were magic, right? A development team at MIT has created a great app for iPhone called Cardio, which detects your heart rate as blood flowing through our face. All you need do is launch the application and look at the camera, and if you're in a well lit area will be even better.
In addition, you can have fun with this app to check the heart rate of chickens and other animals.
Cardio costs $ 5....
