Instant Heart Rate is a program that allows you to easily check your heart rate with your Android device, specifically the screen of your phone with the flash on. (If you don't have flash, you'll need to be in a very well-lit space.)
All you need to do is put the tip of your index finger on your phone's camera and wait for the screen to tell you it has finished working. In just a few seconds, it will display your heart rate, and you'll know if you need to relax a little.
Instant Heart Rate is a very simple application that will save you a trip to the pharmacy to check your heart rate. More than 25 million people around the world are already using it. What about you?