Here comes another one of those apps that drops jaws with its ingenuity — it’s a heart rate monitor that uses the iPhone 4’s camera to measure minute changes in skin color caused by blood flowing into and out of a finger.
According to Heart Rate – Free‘s App Store press release, simply sticking a finger over the iPhoen 4’s camer should deliver a heart rate figure within a few seconds, accompanied by a heartbeat chart. The app’s developer is quick to point out that the Heart Rate – Free is for entertainment only, but the concept is remarkable.
As its name suggests, Heart Rate Free is free.