The Instant Heart Rate app allows users to instantly and accurately monitor heart rate during exercise to optimize performance and track progress. The accuracy of the app is constantly tested by fitness coaches, nurses, doctors, EMTs and app users.

Simply press gently with your fingertip to cover the camera lens completely. Using just the camera on your smartphone to detect the pulse from your fingertip, the app will beep while showing a real-time chart of every heartbeat. The app also features a continuous or auto-stop mode, heart rate zones, one week data storage and tags, and the abilities to export data and share on Facebook and Twitter.

The app works best on devices with flash, such as the iPhone 4/4S/5. On other devices, the app must be used with good lighting.

Click here to download from iTunes.