Instant Blood Pressure Tracker is a free app that is designed to help you track and manage your blood pressure, heart rate, and weight for you. It allows you to monitor your bp, heartbeat, and pulse using your own heartbeat sensor. The app supports Android devices and it is compatible with most modern Android devices. The best thing about this app is that it is completely free to download and use! You don't need to worry about any in-app purchases. 

With this app, you can manage your bp, heartbeat, and pulse, record your history, set goals, view trends, and generate reports in PDF. You can also keep a diary and keep notes. 

Note: This is only a tracker. It is not possible to measure blood pressure with this app, nor is it possible to measure heart rate.