Completing the iPhone trifecta for today is another application that really gets me excited about the possibilities that this device can have. Â John Ballinger has made it possible to monitor your heart rate and store those rates in the phone. Â Now i’m sure these wouldn’t be used for accurate testing, but it’s a great way to monitor yourself while you’re out running. Â The application has not been approved as of yet, but I can’t see why Apple would reject it. However, I have no insights into the approval process, so who the heck knows. You can watch the video below.